The word 'comfortable' needs unpacking, because it's covering a whole lot of problems.
Safer than in the men's facilities? That's a whole can of worms there.
More able to express their true selves? That's great, but that can surely be achieved without having to crap on the entire female half of the human race and remove all privacy from them while excluding the ones unable to conform to male choices and desires like good girls?
And it cannot be handwaved away that for many males choosing to cross dress or use female spaces, as any amount of online evidence shows, 'comfortable' means sexual enjoyment, using non consenting females as props, and for some of those males enjoyment will also come from invading female boundaries, doing something 'thrilling', seeing females uncomfortable and enjoying that power and control, and intentionally pushing female boundaries.
Fuck that. I am not living in a country where to be unlucky enough to be born with female biology means you're compelled by law to be used by any male who wants a thrill, and to be 'kind' about it. There is no way this can be justified unless you are very clear in your own mind that there exists a hierarchy of sexes, you know exactly who is which sex, and that males are above females.
It is not brave, nor stunning, nor even basically decent, for males who identify as women to therefore expect to dominate and remove rights and spaces from women without interest or care for those women. It makes the whole 'identify' thing sound extremely shallow.