This is in fact an unpopular opinion. You heathen.
Joking aside, when I was first learning HTML my teacher always hated when students inverted the colors to make a “darkmode” because she said it gave people headaches. So I guess it’s a thing.
Depending on how old you are, your vision also naturally dims as you age. This is also why stuff designed by older people is often blindingly bright to young people and vice versa. I’m willing to bet that if a survey was done it would show that the popularity of darkmode drops sharply as users age.