Comment by diffeni

> The social convention is: "I say 'he' if and only if the person in question is male".

Yes. Therefore by that convention:

> calling for instance a transgender woman 'he'

is entirely reasonable, because "transgender women" are, by definition, of the male sex.

If you don't agree with that, maybe this article will provide some food for thought: https://fairplayforwomen.com/pronouns