So - sorry, once labor is over the mother's role can not just end and in many ways it increases dramatically as she will for many weeks be getting extremely broken sleep (up several times during the night to feed for 30 mins at a time each at least).
Having said that, I hate it when anybody tells anyone else they can't do something. As a startup you're going up against huge odds in the first place and doing something nearly impossible almost by definition. If you're the kind of person who just gives up when someone tells you something is a bad idea then you probably ARE the wrong person to do a startup, but it's got nothing to do with babies.