Not everything needs to prioritize accessibility. This page is mostly tools for video games which typically have no accessibility. I think you may be bringing a pet concern into an area that isn't relevant.
What we, or at least I, want to ensure is that developers outside of the gaming context don't get too fired up by this manifesto, develop non-game-related tools in that spirit, and thereby block someone from doing their job because the tool is inaccessible.
Not everything is going to work for everyone from the very start. You don't need to stomp on every piece of software because it doesn't have niche features that you care about intensely. Pick your battles, each of these programs were created by a single person and are open source. They aren't government websites, they aren't even the only way do the things they do.
