Accessibility isn’t the easiest subject to get mass audiences excited about. Sadly, I know from experience, because accessibility posts haven’t performed as well as other types on Post Status. That, however, doesn’t make accessibility less important — not by any stretch.
And significantly, there are now a set of standards drafted for coding for accessible features in WordPress core. As noted in the standard, it’s not exhaustive, but it’s a start: “These basic guidelines are intended for easy reference during development, but do not cover all possible accessibility issues.”