Haven’t heard of the stack address thing, anyone got a TLDR on the topic?

I thought function calls was one of the decently optimized things in Python

That is sort the point. Transgender people tend to just want be whatever they want gender-wise, which greatly offends some people. Other than that our language is gendered and many transgender people expect common curtisies, extended gender normative people, to also be extended to them. This being using their preferred pronouns.

The labels just help people talk about their gender and understand it better.