This is spot on. They are ripe for getting entirely wiped out by AI, and good riddance tbh.

My personal gripe is their refusal to support restarting heading levels within sections, causing whole classes of problems with CMS templating.

ARIA-AT is a W3C Community Group (of which I'm a member) trying to address this problem: https://aria-at.w3.org/about

Why would they want to improve their tools? In many cases (Vispero), they're the ones selling accessibility consultancy