it helps a ton if the thing you have to be up for keeps a roof over your head. i still stay up until 3am some nights, but i always know i NEED to get up now for survival. days off I still sleep about 12 hours though, but some weeks I literally get like 15 hours the entire work week.
knowing your livelihood depends on you getting out of bed changes a lot.
Sleep debt is a major cause of depression spirals..
You get tired, therefore depressed, so you do things to medicate..
But then that doesn't fix the problem, so then you become reliant upon the medicine just to coast by..
All the while, having not enough energy to improve oneself, or one's circumstance.