Often it's a boss proving they're in charge by setting the times.

It's also a handy way to keep raises small. Oh you are being a human and we don't give raises to people who are human. Meets expectations, 2% raise.

If that was the retro topic, we're already off to a bad start. You're making a judgement before we even started retro.

sleep in

    to sleep until later in the morning than you usually do

Read it like this: Usually people don't wake up that late. But Tooooodd likes to sleep in, so now everyone's gotta interrupt their workflows at 10:30 just for Todd. Discuss!

So do it just before lunch

That isn't the point. The point is the judgemental "question" type thing.

But also that is 2:30 p.m. for the other two guys, i.e. prime "still caffeinated and in the zone" time ;)