So I agree with some arguments against using dark themes but only because they all seem to be about white text on black, but I would never use that as a dark theme... (who would?) Dark shades are where it's at! Take devRant itself as an example.

I had a hockey accident where the hockey stick hook caught me in the eye and among many other things, tore my iris to the point that the doctors couldn't stitch it (something about cutting being reparable but tearing not :/ )

Luckily with some exercises, it healed a lot in its own but still let's in about double the light it should. Since then, black on white for more than a few hours will, without fail, give me a migraine. But then so would white on black, too much light allowed in means that white on black give an almost blurry effect on the characters. Hence, colour shades for the win :D

Just my 2 cents ¯\_(ツ)_/¯