Personally I like dark mode because most of the time my screen isn't looking at things that are majority pure white, it's looking at games, or videos, or blogs with a background color, or whatever. If I adjust my brightness to see relatively dark things comfortably, then things in light mode are now too bright. But since I look at more things that aren't pure white than pure white I adjust for the more common use case. The increase in blank space in UIs and the trend towards less color and differentiation have made the number of things where light mode is unbearable too high.