God created us this way. Just like oxygen and food, we need sleep to work right. It won’t look the same for everyone, and some are in situations where their care for others inhibits a solid snooze, but know for sure that we need sleep. It was God’s idea.
I know with littles ones a good night’s rest is hard to find, but it is worth working for. I think we can go so far as to say that getting the sleep your body needs is part of your Christian responsibility. It might not be easy, but it will be worth it.