Is it? Or is it a reflection of the reality that trans men may not identify themselves as trans at medical appointments abs may indeed be pregnant or plan to get pregnant?
You know what, you're right. You are absolultey correct.
TRANSMEN DO NOT IDENTIFY THEMSELVES AS FEMALE IN SITUATIONS WHERE THEIR SEX IS RELEVANT.
And as a result... a bunch of people who are NOT trans, are now being subjected to inane questions just so that the few transmen who aren't smart enough to say "oh by the way, I've got a fully functional uterus, and that might be important for you to know" don't have be reminded that they're actually females. And also so that the few transwomen who really need the entire rest of the world to validate their view of themselves don't get upset that the doctor accurately and appropriately views them as males who cannot get fucking pregnant.
So yeah - you're right. Everyone else has to drop common sense off of a cliff because of a handful of people who aren't smart enough to provide necessary information to their doctors.
FFS, not every doctor is going to ask if I'm epileptic. Guess what I tell every single fucking doctor I deal with, even if I think it's probably irrelevant? "Hey doc, I'm epileptic, thought you ought to know, just in case it makes a difference". I, as a rational and intelligent and caring person, think it would be wildly presumptuous and arrogant of me to expect the entire medical field to start asking every single patient whether or not they're epileptic, just so I don't have to be burdened with taking responsibility for myself.