Easy, conservatives agree with feminists about portrayal of sexy women. Conservatives want men back on the plantation. Notice the same opposition comes from conservatives years ago against pretty much the same things feminists hate. Video games, porn etc etc.

The only thing that differs is the rationale. Feminists hate men so anything that gives anything good to men is to be vilified. Conservatives want men to serve / sacrifice so anything that distracts men from doing that is to be villified.