The Bible doesn’t teach that man is born with a sinful nature (not even in Romans 5), and neither did ANY of the old church fathers the first 250-300+ years AD. The idea of the sinful nature can be traced all the way back to Augustine who made this gnostic idea popular in church, and before him it was the gnostics who taught it. If neither the Bible, nor the old church fathers taught this major doctrine, the chances are that it’s false.
Jude 1:3 Beloved, when I gave all diligence to write unto you of the common salvation, it was needful for me to write unto you, and exhort you that ye should earnestly contend for the faith which was once delivered unto the saints.
IF we are born with a sinful nature, then we will have great excuses for our sin on judgment day. We can simply blame our nature that makes us sin by necessity, and which we didn’t ask to get. Moreover, we could also suggest that Jesus Christ was given an advantage over us, unless we believe that he too was born with a sinful nature?
We will die physically due to Adam, because we can’t reach the tree of life due to him, but sinning is something we DO and nothing that can be inherited.
You can read more about Rom. 5 here.