Whether that control you see visually is actually accessible to a blind user is a different matter entirely. Further, it maxes out at 2x, but a blind person would typically screen read at the equivalent of 3-6x.
> Another way in which it's not cheap to lose sight, I guess.
True.
We can frame it even more strongly: "default societal practices actively discriminate against people with disabilities; they intentionally, consciously choose to make life harder for people who're disadvantaged".