I'm pretty sure he's saying the guy/gal working from home with 4 kids running around can't be a productive employee. Which is probably true for most cases. Kids can be a giant distraction.
When at home, if I feel the a distraction looming, it's easy to shut the door. Problem (mostly) solved.
However, I was specifically replying to the context of having distractions (kids, in this case) in gcp's and alistairSH's comments.
For all we know, said employee was paying alimony for them.