Our inheritance is not a “sin nature”, it is Death. Before (Genesis) man was created, arguably, Death existed, poised for what looks like the inevitability of man.
Death was before man’s sin, therefore, because of preceding Death, men will sin.
Death does not cause man to sin, it’s solely his inheritance, by reason, that men will sin.
The resulting guilt from the act of sin remains exclusively with the perpetrator; never is one’s personal guilt transferable unto another (i.e., a descendent).
And yet, it is said that we now have Life– the divine (Logos) Word of God: Jesus– the Idea, manifested.
Why else would man be the very fulcrum of the cosmos– what better answer could there be other than: a man?
Why else would we be so ultimately crucial to the macro-existence of it all?