But He did, indicating quite strongly that your assertion is wrong.
Only if you presume Mary sinless, indicating quite strongly that your presumption is wrong.
To turn the logic around, if God could create a new species of human being—sinless (that would be Mary)—before the miraculous birth, life, death, and resurrection of Jesus Christ, then why in the world would he need to go to the trouble to come to earth incarnate in the first place?
I mean, God would only need to cause a sinless Joseph to be conceived too, then the world could have been repopulated with sinless people—without all that messy business of the cross...
(naturally we’re debating on air—as not a word of God’s Word is about this.)