With my glasses on, which I kinda need to be a functional human being, there's little difference.

It seems you've stumbled on the root of the issue. I guess some people just can't see the blur. I don't have a particularly special phone and I've unfortunately been without my glasses all day. It's likely due more to experience and 'training', but it's easily apparent that my half-assed screenshot is significantly clearer. Less contrast, sure, but that doesn't magically remove the blur. Most likely the biggest factor is that many people just don't care, which I find beyond frustrating.