gobbledegook, sorry, you are making no sense. If Mary hadn’t been sinless, she could not have held Jesus.
Mary was not sinless. The Bible says, “All have sinned and come short of the glory of God.” I believe it is in Romans. It does not say, “except for Mary.”. There has been only 1 who was sinless.
According to whom?
If you say... The Church (while meaning the Roman Catholic church) then show me precisely from "infallible" Magesterium where they say that is the case.
Or admit (to yourself, at least) that it is an old wives tale sort of thing, all dressed up in religious clothing.