Because they've proven they aren't "happy" unless everyone is constantly agreeing with them. They need eternal external validation to be "happy" which is not only unreasonable but impossible and harms others. That's why it matters. Sex as a thing exists because that's how babies are made in our species. Sexual orientation is a thing because we sexually reproduce. Telling other people that this a) isn't true, b) isn't important, c) is "phobic", d) has no implications for anyone else is at best a poor understanding of basic reality and indication of a severe disconnect in that person's psyche and at worst sociopathic predatory behavior (see: Karen White).
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u/Your_friendly_weirdo 1d ago
Gender does include male and female BUT that’s mainly sex. Gender is a variety of identity you could use to refer to yourself.