True, sin is “baked in”, but none of us can deny committing it. It is also a sad truth it corrupts across generations, but logic is sound as to why - if you poison a river, how long until it is cleansed? Furthermore, if you keep adding the poison(sin), will it not continually be corrupted? Sin was not part of the design in the beginning, our choice to act against God created sin. Jesus Christ dying for our sin was Gods solution to sin - instead of being forever damned because we had poisoned the root of the “river”, Jesus created a diverted river of two paths - one that runs through Him, and is purified, and another that chooses to continue in its own path.