You don't hire people to do things because they do them better.You hire people to do things because then you don't have to do them. They almost invariably don't do them as well, or as quickly, or tidy up afterwards but that absolutely isn't the point. The point is: to choose what you spend your own valuable time on. To do what you want to do, not what you have to do.

I'm a reasonably skilled mechanic, but I would never service my car as long as someone else can do it with breaking it too badly. Eventually when too many things are broken, I get another car.