The problem is, that many of the developers are mistaking the Dark mode with BLACK mode (like Opera GX, Telegram's night mode, Android's [MIUI's] dark theme, and similar themed applications). Dark mode - as with Discord - is really about having the contrast _reduced_ and overall making the whole experience more dark greyish, which reduces strain on the eyes. Try this with BLACK instead, and you'll start to cry after a couple of minutes (yes, I know, I'm old and grumpy..). The very popular dark themes, like Monokai are popular exactly because they respect these very simple rules: 1. dark does NOT mean black, 2. reduce overall contrast.
I personally HATE the fact, that with Opera GX for example, you don't even have the _ability_ to choose if you would like to use the Dark mode (which is, again, BLACK mode in reality).