I've had to accept that people are just very different when it comes to this.

I'm someone who rarely ever wakes up with an alarm (usually I wake up before it and turn it off). I never snooze an alarm either. Alarm goes off, I get up, even if it's hours earlier than usual.

Clearly there are people who simply can't actually do this, for whatever reason.

For me, the "opposite" holds. The only times I've ever gotten up past 7am regularly are when I had jobs that had shifts that ended past midnight.

Otherwise I absolutely cannot stay awake past 10pm consistently.

As habits, staying up late for me appears as impossible as getting up early is for my wife.