Getting to school is very difficult for some people, especially if they come from a poor family. In high school, just getting there was such a hassle. I took three different busses. I remember getting up a 5 a.m. to get to there. And my student advisor(the principal) told me I needed to work on my attitude.
To take it further, never understood the reason to be at pretty much any job before 10 a.m.
Construction is notorious for early hours. Pretty much nothing gets done before that first coffee break.