Because having the Sun rise at 8:30 is really late. We waste energy and secondly people are spending 2 hours of their morning in the dark.

Having the Sun rise at 4:30 is bad because it's just too early to get up and makes for poor sleep. Having the Sun set later in the day is better in this case.

whats 9:30 vs 8:30? Just a label.

Work when the sun is up, call that 9AM. Wake up at X AM so you can get to work on time. It's all just a label, so long as humans can agree.

For a lot of people it's the difference between having a job and being fired. Try telling your boss that you're coming in at 9:30 because it's just a number.

Make chronotypes into a protected class and institute national flex-time.

i guess this is where we post /r/antiwork or other great resignation or something.

But yeah I hear you, some people can be so unreasonable. Nonetheless we should refuse to design our society around unreasonable people.