Don't you believe Paul's words in Rom 6;6-7?
"Knowing this, that our old man is crucified with him, that the body of sin might be destroyed, that henceforth we should not serve sin.
For he that is dead is freed from sin."
When and how is it that our old man is crucified? Is it not the new man within us that is killing old man by overcoming those things that lead us to sin?
The world that contains those attractions is the little world of you and me and the other guy. It is not the world that Jesus overcame:
"These things I have spoken unto you, that in me ye might have peace. In the world ye shall have tribulation: but be of good cheer; I have overcome the world." John 16:33
Jesus overcame the world of his own flesh which was tempted by the same attractions. He did not overcome planet Earth on which men live. This is why it speaks in Revelation chapters 2 and 3 7 times of overcoming. This is the work that Jesus did not do.He overcome only his own temptations, not ours.
His sacrifice opened the Way that was closed. Now by means of the Holy Spirit and the Word of God in us it is possible to overcome the temptations in us then we may qualify for the benefits of an overcomer:
If we do not overcome, we cannot eat of the Tree of Life and never die:
"And the LORD God said, Behold, the man is become as one of us, to know good and evil: and now, lest he put forth his hand, and take also of the tree of life, and eat, and live for ever:" Gen 3:22
"He that hath an ear, let him hear what the Spirit saith unto the churches; To him that overcometh will I give to eat of the tree of life, which is in the midst of the paradise of God." Rev 2:7
If we do not overcome, we have no protection against the second death:
"He that hath an ear, let him hear what the Spirit saith unto the churches; He that overcometh shall not be hurt of the second death." Rev 2:11
And what else will we miss because we do not overcome? What is the hidden manna and the white stone? What is our new name?
"He that hath an ear, let him hear what the Spirit saith unto the churches; To him that overcometh will I give to eat of the hidden manna, and will give him a white stone, and in the stone a new name written, which no man knoweth saving he that receiveth it." Rev 2:17
And the power to rule nations is given to whom?
"And he that overcometh, and keepeth my works unto the end, to him will I give power over the nations:" Rev 2:26
And whence and to whom cometh the white raiment? Who will not have his name blotted out of the book of life?
"He that overcometh, the same shall be clothed in white raiment; and I will not blot out his name out of the book of life, but I will confess his name before my Father, and before his angels." Rev 3:5
Who will be made a pillar in God's temple? Who is it that will not again leave that temple of God?
"Him that overcometh will I make a pillar in the temple of my God, and he shall go no more out: and I will write upon him the name of my God, and the name of the city of my God, which is new Jerusalem, which cometh down out of heaven from my God: and I will write upon him my new name." Rev 3:12
Who is it that will sitting with Jesus in his throne because he overcame as Jesus overcame?
"To him that overcometh will I grant to sit with me in my throne, even as I also overcame, and am set down with my Father in his throne." Rev 3:21
"He that hath an ear, let him hear what the Spirit saith unto the churches." Rev 3:22
"For whosoever hath, to him shall be given, and he shall have more abundance: but whosoever hath not, from him shall be taken away even that he hath.
Therefore speak I to them in parables: because they seeing see not; and hearing they hear not, neither do they understand.
And in them is fulfilled the prophecy of Esaias, which saith, By hearing ye shall hear, and shall not understand; and seeing ye shall see, and shall not perceive:
For this people's heart is waxed gross, and their ears are dull of hearing, and their eyes they have closed; lest at any time they should see with their eyes, and hear with their ears, and should understand with their heart, and should be converted, and I should heal them." Matt 13:12-15
You are opining that those born of God CAN bring forth evil fruit,; counter to 1 John 3:9..."Whosoever is born of God doth not commit sin; for his seed remaineth in him: and he cannot sin, because he is born of God."
Perhaps it is you who is presuming who is or who is not born of God. What does being born of God as per the verse you provided mean? Remember that according to the flesh a person conceived remains in the womb for about 9 months. Then natural birth occurs but some are still born.Some die before ever attaining maturity. That is but a shadow of the real thing, and shadows are a dark image of what?
The following verse speaks of the incorruptible seed
"Being born again, not of corruptible seed, but of incorruptible, by the word of God, which liveth and abideth for ever.'I Peter 1:23
Considering the verses I posted above from Revelation it would appear that someone who has not overcome has not been born again because he has not yet been able to enter in and eat of the Tree of Life.
God has allowed us to kill the old man...and his ways. (Gal 5:24)
That "way" is open to you still.
God has provided a Way for us to kill the old man, but we must do it and/or allow the new man within to do it:
"Wisdom hath builded her house, she hath hewn out her seven pillars:
She hath killed her beasts; she hath mingled her wine; she hath also furnished her table." Prov 9:1-2
Has wisdom from God killed already the beasts within us so that we are no longer attracted by the temptation to sin?
Jesus who never sinned, nevertheless had those same beasts within his body of flesh encouraging to sin as we read in the gospels. He overcame all of those beasts. The means has been provided for us to do the same... but we must do it. The choice is always ours. That is what man calls "free will". We have two choices: our way [the ways of sin and death] or His Way [the Way of Life].
Jesus did not die and send the Comforter [Holy Ghost] so that we could sit back on our haunches and continue to sin because we cannot help it. The only Way around it is to overcome: What again? All that is in us that attracts us and leads us repeatedly to sin:
"For all that is in the world, the lust of the flesh, and the lust of the eyes, and the pride of life, is not of the Father, but is of the world. " I John 2:16
Give God the glory!
The ways of the flesh will be with you until you turn from sin and are baptized into Jesus Christ; and into His death, burial, and raised with Him to walk in newness of life.
They will be with us until and if we have killed all of our beasts: the old man!