It's difficult for men to breastfeed the kids, that is one of the problems... And why is it not a female-privilege issue? How many jobs are so great that they are preferable to taking care of your own kids?
I can say with absolute certainty that if my wife could bring home the same salary as I do, I would trade places with her in a heartbeat and be a stay-at-home dad. It's not even a ? in my mind.