I am more productive now than ever and I have 3 kids. I would attribute this to breadth and depth of skill, always learning new things and of course, working remotely as a consultant which gives me huge amounts of time and energy that other car-bound people simply don't have AND the biggest one is I have an amazing wife who stays at home with me and let's me focus on my work. Maybe that is rare so maybe the guy had a point for the majority?