If I had to guess based on my experiences of fem!slashy fandoms, it's more along the lines of "If you don't ship them and you think they're "Just gals being pals" then you're guilty of lesbian erasure, a disgusting homophobe, don't deserve any number of human liberties, and around 300 other comments along the lines of that.

It's not that anyone can stop you from having your head canon, but they sure as fuck do try.