Why isn't it okay to pit two women against each other but it's okay two pit two men?

I always see users saying to not pit successful women against each other when someone compares girl groups, but I've never seen someone saying to not pit successful men against each other when someone compares two boy groups.

Why is that?

because of sexism, women have it harder, so we should just appreciate them all

probably because it rarely happens in general

women and men are biologically and psychologically different so different rules apply them

Apparently feminism makes female competition to be talked about in public wrong even though women do have Intrasexual competition just as much as men do.

one word misogyny

because people will make everything about gender when it comes to competition bewteen two female idols/groups. most of the time it's just normal comparisons that also happen bewteen boy groups lol