Dad's have a lot of responsibility and things going on. They have kids to make happy. There's usually a wife they are working with on family issues and their own relationship. They have to fix things around the house. They have jobs during the day. There is very little time for rest. That's why we don't blame this dad for taking time to get some shut eye even though it appears he takes every chance he gets.
We salute you, dad. Get that rest you so deserve.