Personally, I struggle to see anything that would be wrong with people playing than the one that they identify as be it in whatever form (roleplay, video game, etc.). To be frank, the idea that one must play their own gender is an ignorant take. No one cares if someone plays a Dragonborn in DnD, which has scales, a tail, etc. No one cares if someone plays a blue-skinned Toydarian in a Star Wars setting, which has a trunk and hummingbird-like wings. Are we going to tell people that they can't play as these species/races because they aren't human like their actual selves? Of course not, so what's the point in complaining that someone dares to play a different gender?