That doesn't appear to check out biblicaly, or from any logical perspective I can think of.
The Lord saw how great the wickedness of the human race had become on the earth, and that every inclination of the thoughts of the human heart was only evil all the time. Genesis 6:5
The Lord has looked down from heaven upon the sons of men to see if there are any who understand, who seek after God. They have all turned aside, together they have become corrupt; There is no one who does good, not even one. Psalm 14:3
What is man, that he can be pure? Or he who is born of a woman, that he can be righteous? Behold, God puts no trust in his holy ones, and the heavens are not pure in his sight; how much less one who is abominable and corrupt, a man who drinks injustice like water! Job 15:14
The third reference is stating that no one is capable of perfection, and that no one can earn their way back to God - but impurity only requires that someone not be perfect, not that they have no good.
To be clear, my argument is not that humanity is 100% good because clearly that's not the case. My argument is simply that there is natural good in humanity as well, and most people have more of it as children than after it's beaten out of them as adults.
That is just my reading of course, and I am no expert.
