I don't have any vision problems and still I don't get dark mode. It's harder to read. Maybe it's because I work in a bright room, but even in the evening I don't really see the point of dark mode.

It's good that it exists though. Some people have different work environments or other types of vision problems than astigmatism, and if dark mode works for them supporting it in more places is good.

Maybe we could also have a way to indicate that the user wants high contrast, but that starts becoming a lot of special cases to design for.