These kinds of roles are for youngsters with minimal commitments who are looking for their shot to break into a wild industry. It’s not for the middle aged single parent with FTE and just enough free time to do an extra load of laundry.
I’m trying to imagine what would make it impossible to not pay attention to your children for four hours and the only thing I can think of that can’t be scheduled around is…a very young newborn, maybe? If they’re prone to waking up constantly?