In the Franciscan tradition of theology, Jesus became incarnate out of Love, not only to 'redeem' from sin.
We all, individually and as 'humanity' collectively,  have quite enough sins of our own that need redemption, don't you think?

Of course, personally, I never quite understand this Jewish --- and many other religions -- fascination with blood sacrifice, and the idea that that pleases God or is demanded by God. Ideally it's supposed to be actual human sacrifice, though Jews at least allowed substitutions. Makes for a weird sort of God, to my mind.

But that's what the prophets said a 'messiah' had to do, so Jesus went along with it.

Baptism as remission of personal sin would seem to be what Jesus had in mind. Jewish people had no understanding of 'original sin' as something inherited -- that idea came in with St. Paul.

There is no 're-imagined' original sin. That's the point. Jesus' death and resurrection has better reasons than dealing with a non-existent imaginary 'sin'.