The elephant in the room is that "passing" is often little more than wishful thinking, and people are starting to understand this. Ultimately, a shared focus on full transparency about being 'trans' or 'cis' is quite helpful at de-escalating hostile attitudes and discrimination about the matter - one could admit of rare exceptions, but by and large, anyone who feels like they must hide themselves for "safety reasons" is likely better off leaving the unsafe environment entirely!
Unfortunately, even a lot of places that are generally trans-supportive won't admit refugees fleeing anti-trans violence - or when they do, they're not treated much better than the place they left.
I'm not sure what your first comment is meant to imply, but I suspect you might be suffering from confirmation bias if you think that passing isn't realistic.
