No, it's related to Astigmatism. The eye lens gets distorted. Bright light shrinks the pupil, meaning the light goes through less of your lens and hence is not as distorted.
You said: “ 1. No light mode (why does everyone want dark mode, it sucks for anyone older than 30)”
I’ve had astigmatism literally my entire life and, once again, have loved dark mode anywhere it’s been offered (except my Kindle, which just looks weird).
Every programmer over the age of 30 that I know uses dark mode exclusively, and there’s a reason companies offer it: it is widely used and demanded.
Acting everybody in the demographic of people over 30 feels the way you feel about it on account of their age is just laughable.
Judging from how many older coders use it I think it’s just you, mate.