Having a child makes you strong and gives you chutzpah. It relaxed my attitude to the job; my center of focus shifted, which I think is very helpful, because even if you're not a very indulgent actor you spend a lot of time thinking about yourself. I don't think that is particularly healthy.
If you factor in not just who's doing what at home, but how much more time working fathers are spending on work outside the home, on average they spend two hours more per day outside the home.