>Customize your device for your comfort.

I think the better advice is, customize your environment for your comfort.

Often the reason why people use dark mode is that they use their devices in badly lit environments. It's not a good idea to stare into a bright monitor in a dark room, and the dark mode is arguably the wrong fix for the problem. Reading in dimly lit rooms is known to cause headaches and eye strain and should generally be avoided.

If someone really needs to work in a dark environment tools like flux/redshift are a better solution.