People really believe this. And also if you mention other disabilities that affect a similar ratio to the one they care about, ie 0.16% of people, they'll say it's too expensive and doesn't affect enough people. Like what if I want this content to be consumable by people who have such heavy learning disabilities that the whole content would need to be 20x as long and explained much more step by step?

They were uploading these for free. The end result of the videos being taken down is that they are now even more inaccessible to that 4% than they were before.

Making things more accessible is a worthy goal, but the world is imperfect and making things better requires resources.