It's not just blind people, but also people with reduced eyesight. As I'm getting older, I really appreciate good contrast and the possibility to zoom in without breaking the layout.
And how does tailwind or the structure of the underlying html of the page change or affect that?
People always forget they're one unlucky event from losing their sight, hearing, dexterity, or more. Hell, like you say, even aging's enough to do it. Accessibility suddenly becomes a lot more important when you're on the other side of the "not a priority" talk.