Not the first time he's not at the same page as the rest so hardly surprising even if not intentional, although it would be amusing if he brought Yuki's uniform aswell.
Also, why would he dislike dressing like that? Clothes are just clothes, nothing more. Originally, different clothing were made for practical reasons that really don't apply anymore.
(People today don't move that much in ways where a skirt would be problematic, as for women and pants the modern ones are easy enough to put on/remove, a non-issue now.)
As for reality, what minorities have to put up with when alone is worlds apart from what they have to put up with when atleast two.
For that reason it's strongly recommended to never place someone with differences alone, with noone similar around them.
Well, also known mixing groups generally helps productivity, a truth that feminists love to bend like crazy for their lies.