Irrelevant. You aren’t forced to buy the dresses either, doesn’t mean it makes sense to have them in the game. Likewise, it makes no sense in this case either. They implemented these slots, which likely took effort, but there was really no point from what I can tell.
What’s the point of having more than one option of anything in the game then? I mean, you only need one type of sword, one type of axe and so on. Choice is nice to have even though if choice not always is needed or have a function.