Edit for context:
My view is transracial isn’t valid and this person is trying to dogwhistle. I’ve already blocked this person, and now they’re going after my friend saying my friend is transphobic because they disagreed with them about transracial being a thing (they’re purposefully leaving the context out so my friend looks transphobic when what my friend really said was transgender is valid but transracial isn’t)
Problem is that “race” isn’t just cultural. How you will be treated definitely depends on how other people perceive your “race” and subsequently it will shape your life reality.
That person you gave as an example? In the US, Canada or most European countries he will be treated better than an actual Citizen born and raised in the respective country who is perceived as “black” or “brown”.
But surely how you will be treated definitely depends on how other people perceive your “gender” and subsequently it will shape your life reality?
Everything you described up there sounds exactly like “cultural.”