You can do whatever you want, I guess.
But you might not get the results you want. To do that, you may have to follow someone else’s rules.
What I mean is, you may not like getting up early. But if that’s the time where you can get your work done, that’s what you have to do.
Of course, in my specific example, a 2 year old can decide to wake up at 2am and mess up all this supposed “work” you were going to do…