Earlier quoted context omitted.
I used to believe like you do. What I believed to be my natural schedule--what I naturally gravitated to--was the nite-owl 1am to between 9-10am or so sleep schedule. In school, I always felt sleep deprived when I had to wake up around 6. But I recently spent the better part of five months going to bed at 9:30pm and waking up at 4:30am. Despite getting less sleep overall, I've never felt as well rested or alert throu…
Sleep schedules dramatically change with age and a lot of sub conscious stimuli. So, don't try and generalize from what works for any one person. EX: I have started to get up around 6am even if the room is dark and I am not getting enough sleep. I find it annoying, and nothing changed but my age.
I'm also not trying to generalize to everyone, I'm only surmising that there may be a lot of people like me. It's arrogant to assume your personal experiences apply to specific other people, but it's equally arrogant to assume you're a snowflake and that other people's experience is irrelevant to your situation. Everyone is their own unique blend of the many human commonalities.