DY: So,what IS your point?
Not that yayin is mutar, rather that the same reasoning for the issur should apply to bishul.
So your main point is that when Igros Moshe 1:46 writes “???? ??? ???? ???? ???? ??? ???? ????”? ?? ????????? ?????? ???? ????? ?????”, what he really means is that Bishul and wine are equivalent and both apply to a Mechalel Shabbos due to the Minhag?!?!
You’ll need a really big shoehorn for that one.
I’ll try to get to your other points later.