You have to deal with a whole list of different service companies just to keep your house clean and functional. You'd rather spend your time doing things you enjoy.
A random subcontractor shows up to do the work and doesn't understand your needs or your home. When something goes wrong, you'll never hear from them again.
What do you actually get? Oh, and the fees. Trip visits, travel fees, service fees, all of the fees -- they add up and they feel gross.