Well that's because that's true.
I recall posting about this on FWR a couple of years ago, around the time there were a slew of articles and blog posts from trabsactivists and people were desperately trying to dig into the trans arguments to make sense of them.
The problem is there is fundamental disconnect in how language is being used. You and I use it to make meaning clear, to communicate. The current identity movement use it to signal who is in and who is outside of the group. Which is quite ironic for a movement all about inclusion, but so much is.
You read it all from a starting assumption that language is being used to clarify. But what you are actually reading is a number of language cues that indicate whether someone is a true believer, or maybe one of the sacred caste. The language shifts all the time because that's how they stay aware of the heretics, and how they constantly keep each other a little off-kilter, and thus easier to manipulate.
I could use a short word to describe this sort of phenomenon but I'd get deleted for it, because they really don't like it being pointed out clearly (obviously, given what I've just explained about their use of language).
But the dynamics are very clear once you understand this basic disconnect.
All of which is to say, don't expect to make rational sense of it. That's not what their arguments are for. Your reaction simply means you are outside the group. A fact which should be an immense comfort.