I think it's just a case of a French commenter + huge chip on her shoulder=makes herself look stupid and uptight.
One of our old friends/neighbors was a linguist (and English was not his first language.)
He spent about an hour one evening emphatically correcting we Americans for using the expression 'party in your pants' (someone was reiterating a commercial or something that used the phrase) because, in fact, it is NOT possible to have a party IN your pants. Maybe outside, but NOT inside. To which, of course, the native English-speakers were all, wow, guy, chill out: it's just an expression. But he was like, "NO! NO you CANNOT say that: IT'S NOT CORRECT!"
He truly, truly just could not wrap his mind around the fact that it's a colloquialism and felt that we were all doing the English language a disservice by saying things that were just not factually possible.