I've always considered myself to be a night owl. I struggle to go to bed on time. Yet on some of my lengthy remote travels I learned it's all bullshit.
There, the sun sets at 6PM. There's little artificial light, and nothing much to do, so some 2 hours after dinner people tend to go to bed. So for weeks I went to bed around 9pm and wake up super fresh at 5-6am like some crazy morning person.
Just like that. Zero issues. So no, I'm not a night owl, it's distractions that make me not want to go to bed, it's not that I can't.