Of course I like "pure black dark mode" because it feels best on my eyes. I have tried many themes to confirm that.

We can discuss the blue light aspect in its own merit.

The same thing does not feel best on everyone's eyes. I like black dark themes and they feel better because they are higher-contrast and thus are easier to read. For me (and probably for others), they reduce eye strain.

'feel' and 'like' are pretty much in the same boat here, I think. I mean is the person you're responding to really going to claim to like something which doesn't feel good (esp. since it's about themes, and the OLED mention)?