I guess it's analogous to a roomba. If it misses a spot, I can always finish up with my own vacuum. But even a roomba will occasionally decide to drag a swath

I guess it's analogous to a roomba. If it misses a spot, I can always finish up with my own vacuum. But even a roomba will occasionally decide to drag a swath of cat shit through my house, whereas a hired cleaner would know better.