[pxc]

> I've noticed that dark-theme users (eg during live streaming) crank up their brightness/contrast to compensate for the low-contrast dark themes

On the whole, this actually allows you to achieve the same contrast level with lower total light emission. If you are in fact clinically light sensitive and you also have difficulty with low contrast, you just can't achieve the balance of contrast you need as effectively with light themes.

> then they are surprised to be blinded when they open a webpage, which is extremely likely to be light themed

For me it's well worth it to sacrifice the 'artistic integrity' of web designers' intentions and use something like Dark Reader or Midnight Lizard to force a dark theme across the whole web.