It’s absolutely true that a lot of modern-day problems with being tired come from bad sleep habits. What I’m talking about is a real phenomenon that isn’t being in front of a screen too close to bedtime. If anyone wants to know more, here’s a 3-minute video from AsapSCIENCE about what research shows.
This tracks with my experience when I decide to take a long vacation where I don’t do anything. I naturally stay up later and later until it loops around.
This was true for me in my younger years especially, I ran on about a 32 hour cycle. As I’ve gotten used to my weekday work routine I’m much closer to a 28ish hour routine now.
I did this recently with FF7 Rebirth. It might have looped twice, honestly.