It's not my claim. Take it up with the Author.If man was truly bound strictly to the lost nature, completely depraved then he would never be able to to a thing but live according to all that is against God. Yet we see lost people who give to the poor, have compassion on those in need, and serve others. That alone refutes your claim.
Jer 17:9 The heart is deceitful above all things, and desperately wicked: who can know it?
Rom 3:10 As it is written, “There is no one righteous; no, not one.
Rom 3:11 There is no one who understands. There is no one who seeks after God.
Rom 3:12 They have all turned away. They have together become unprofitable. There is no one who does good, no, not so much as one.”
Rom 8:2 For the law of the Spirit of life in Christ Jesus hath made me free from the law of sin and death.