I’d say that these categories are prescriptive and stereotypical at worst, and at best missing the very important category of Normal People Who Really Just Don’t Feel Sexual Attraction.
I don’t know every asexual person, obviously, and I’m not gonna say those people don’t exist. I’m sure they do. Just I haven’t met any. It’s been mostly category 1 and 2, and a couple from category 3 who just seemed to be collecting labels they thought were cool regardless of they validity. (Casual sex while asexual, um… I see a flaw there.)