The biggest most obvious problem for the idea males can be women if they want to. For ages, twice a week, whatever.
Is our pesky reproductive biology and organs.
That is a real spanner in the works. It's just too important big and obvious. And is THE thing that spell out- female, woman, girl, mother if have had kids. And has done in all the other terms for us in all the languages ever. (for millennia, all over the world, until in historical terms the last 0.000001 nanoseconds of human existence).
Just a pita, stumbling block.
The strategy to overcome this problem is v bold and clever. (As are many of the arguments around transgenderism. I mean they're sociopathic strategies, but clever nonetheless).
Problem:
As long as widely used group terms exist that relate the male concept of woman eg-
Bundle of stereotypes, male gaze 2d automatons what's in outside is pretty much the whole story, not whole people with as much variation as men but a limited number of 'types' ..
(sex kitten, jail bait, angry feminist, d*ke, uptight librarian type, ball breaker, cocktease, mum, milf, old dear, ladette etc etc)...
To their material bodies which highlight in neon lights that they are in fact very different to men in a permanent and fundamental way.
Then it's a hard sell to society as a whole that woman is like a game skin, which can be adopted or removed at will.
Solution:
Redefine the troublesome words.
Insist that woman/girl (and female although redefining that word is partially on hold due to too far too soon) ARE AND HAVE ALWAYS MEANT nothing more than the 2D superficial male gaze. Pick how your want your game character to look. Change hair. Make boobs bigger. Skimpier outfit. Press play. Run about with your woman skin on. (Usually self description is 'girl' which is a worrying observation in itself).
What can those people be called.. hmm.
Well with reproduction it's their function, and always been seen that way by men. Incubators, gestators, walking wombs, vessels etc.
Ok so refer to people with them, by them. It's all a bit dehumanising so that's a win, will help with strategy.
Women means just whatever. Vague is good.
Icky biology bit. Just use that. People with vaginas, ovaries. Menstruators.
And obviously. It's an excellent strategy. Look how far it's got.