Using gender neutral words is easy enough in English but most languages don't have a form like the generic "they" for a person whose gender one doesn't know. This is a debate for another tiem though.

you do not understand the effects of HRT

Neither do you. Or can you prove to me that a "trans woman" athlete doesn't have an advantage in any way? What exactly determines the point in time where they don't anymore?

Yes, gender is an arbitrary thing with no inherent meaning. We assign meaning to it as a society

What meaning, for example, do we assign to it?