You cannot have a potentially infinite list of pronouns that you somehow expect everyone to just learn

Ackchyually yes, we do, they’re called names. A bit different, they’re nouns not pronouns, but functionally there’s gigantic overlap and best of all if the name is short enough it’s actually not much of a bother to never use pronouns to refer to that person. Most of all, it’s regular because we already conjugate names (“bun arrived”, “bun’s pants”, “the letter is for bun”). “bun brushes bun’s hair” not to mention “bun dresses bunself” sounds a bit strange but is perfectly cromulent.

…still if you get your panties in a twist over being addressed “they” instead of whatever you’re used to or, strictly speaking prefer, I think you’re off the mark. I’m cis call me they all you want: Being generic doesn’t take away from anyone’s identity. It’s like being upset that you’re being referred to as a human instead of a barber.