You know absolutely nothing about trans healthcare. The bodies of trans women undergoing medical transition are not medically the same as the bodies of cis men.
They would be if the "cis men" underwent the same transition. The transition has nothing to do with being a "trans woman" or not - lots of "trans women" don't take hormones and you don't have to be a "trans woman" if you take them. Any male taking cross sex hormones will undergo the same changes, regardless of their gender identity.
You seem a little bit out of date with the theology. I believe they call you "tru-scum" - suggesting medical treatment has something to do with being "trans".
The changes hormones make to one's sex are an important factor, and what is medically dangerous is disregarding these changes by regarding trans women as just "biologically male", a reductive and insufficient classification.
Who's using the word "just"? We're not. You put that in there yourself.
Obviously a male on hormones isn't "just" biologically male, they've been deliberately disrupting their endocrine system. That's certainly something that should be disclosed, alongside their biological sex, as it will have a significant effect on their treatment and diagnosis.
The only danger is people like you insisting on reductive, trans-hostile language like "biologically male", when "trans woman" conveys a lot more medically useful information.
Oh, boy, you are seriously out of date. The transgender crowd have left the transsexuals behind. Sorry, you've been outnumbered and replaced. "Trans woman" more often than not now means no medical procedures at all. It is medically meaningless.
The largest danger in medical care is trans-hostile language, as it might lead to trans women being treated like cis men, without accounting for medical transition, leading to improper treatment.
I'm interested - what exactly do you think the risks of an error in that direction are - treating a transitioned male as a non-transitioned male? I'm aware of a large number of risks of getting sex wrong.
But what are the potential failure modes for not knowing that a male is on female hormones, or has had genital surgery?
This is an interesting argument, but it just sounds like a "no you" response to us saying sex being important. Flesh it out a bit.