If you look at the schedules on some of the congregations’ websites, “lights out” can be as early as 8 PM, so that getting up in the dead of night isn’t a big deal. It would be like going to bed at 11 PM and getting up at 5 AM, a schedule I’ve kept for the past ten years. It’s plenty of sleep. They also usually have a rest period sometime in the afternoon, after work and before vespers and dinnertime.
Sometimes what looks like austerity is really very healthy.
Contrast that kind of schedule with being up till one AM, because you had to study, wanted to catch a particular show on TV or met some friends at a pub, and having to get up at six AM, shake the cobwebs out of your head, and get to work on time!