All these comments about people struggling with 8am classes. From 18-19 I had air traffic control training, on the job after our initial schoolhouse, at 545am. You learn to adjust or fail.
I had a restaurant job for a couple years where I had to regularly be in before 5am to accept deliveries. And those were 11 hour shifts. Just because I endured it does not in any way make me feel like we should impose that kind of schedule on others. What kind of nonsense is that? We should aim for schedules that work best for the most people most of the time, obviously.