I think all the changes are supposed to make them more passing, so a greater number of outsiders will assume the claimed sex/gender instead of the original, and that's supposed to be better for peace of mind or something (that doesn't end up being true).

I don't think many leftists argue that gender and sex aren't "supposed" to be aligned, after all, they're the only ones promoting surgeries, hormone treatments, etc. I think they generally agree you can be a woman trapped in a man's body, and that treatment can "free" them so they feel more at home in their bodies. That alignment is the "confirmation."

And I agree, it doesn't make sense.