if their monitor is so dim and pale that they can't read the text it will be a good clue for them to get a new one.
Discussion
So your solution is to change people to fit your ideal society, like Karl Marx?
Karl Marx is winning - isn't he ?
we are supposed to advance technology not retard it.
jokes aside the right way to do it is to have controls as follows:
1 - choose screen type - edge lit / FALD / miniled / OLED
2 - choose ambient brightness level - sunlight / daylight / office lighting / residential light / dim room / complete darkness
3 - HDR - yes / no
3 - vision acuity - normal / astigmatism etc.
my grandma for example didn't like dark mode but she was almost blind. i let her have bright mode even though i found it revolting myself.
i think people with astigmatism can't use dark mode for example.