You are leaving out farmers. They get-up-and-go because the herds and the crops get-up-and-grow. Solar time is all that nature cares about, and farmers have no option in the matter.

I also know that where I worked (industry in a major city), many office workers would deliberately rise at 4 AM in order to beat the morning rush to get in at 6 AM, and leave by 2 PM to get ahead of the afternoon rush. (Or they do it to coordinate with team members scattered across the continent.) I had to get up pretty early even to simply stick with the normal hours.

Actually, my beef is with financial institutions that are not 24/7. If you are trying to handle an international problem, it is infuriating in the extreme to dial up a service number and get brushed off by office hours. Emergencies don't wait for office hours, especially when they are happening halfway around the world.