alt Hacker Newsit's not a misunderstanding, it's reality. yes in theory you can render text in dimensions you want, but in practice we have like 20 different UI systems running at the same time and each have their own quirks and limitations and the end result is unless you're using 96dpi or it's exact multiples. either som ui elements will be looking ridiculously out of proportion compared to something else, another element or image will look like a blurry fudge, and the end result always looks horrible.
Are you thinking of Windows perhaps? Mac and Linux can both handle this well. Even on X11 (which is old and limited in many ways), on 4K monitors global scaling of 200% works really well. But Windows has legacy apps that are bitmap-scaled, which apparently leads to blurriness (I’ve never seen this myself, only read about it. I’m allergic to Windows.)