Having a strict schedule is essential for psychical and physical health.
If you want to be successfull in school, business life or sports you need to have such a schedule. Of course, breaking out of that cycle is possible and not necessarily bad at the exact same day but no person can handle that over a long period of time.
Wrong, wrong, and wrong. I have a pretty lax sleeping scedule. Uni gives me that. I switch from nocturnal, to normal scedule in a matter of days, with no side effect at all. I am physically healthy, and as far as I can tell mentally too.
Stop spreading those lies. Society tells us a strict sleeping scedule is required, but thats not true.