People with non-24 usually have a longer than 24-hour cycle and can't "make themselves" go to sleep consistently at the same time (people with 24.5 or 25-hour days probably have some success with this though because if they stay up a bit later one day and still wake up at the same time, then by the time a proper bedtime rolls around they'll be close enough to their the sleep phase of their cycle, and tired enough to fall asleep at that time)

You can't do this and raise a child¹ without being, well, an asshole. He would force the mother to do all the fixed daily things, and the child to navigate your availability using your private clock.

1: After they've settled into a stable daily sleeping rhythm of course. For a baby this system might even be useful some nights (but not others).