I don't see the OP as narky as such. I would say most mothers of babies who want to go to  back to paid work, even in 2013, would not have the opportunity to keep the baby in the corner of their office/workplace with them. If they did child care centre rooms for the under 12mths would be empty.

3 month old babies do not sleep as much in the day time as babies under 6 weeks either. Well, mine didn't. Maybe I got duds.