I would hire someone to rub my dogs backs and bellies all day if I won the lottery.
Thats a silly thing to hire people to do. Why not just rub their bellies yourself?
I like making my dogs feel happier and cheerful. Sometimes I even sing along while doing it.
It's good to want to make your dogs feel happy, and rubbing their bellies yourself would be very nice. Taking care of your pets is important so they can live long and happy lives. You don't need to pay someone to do it.
You make no sense. I do this because it's my dogs. Dogs don't really mind if they are taking care of by paid people or not.
Pets bond with people by spending time with them. Sure they may not mind being taken care of by strangers but their bond with you will be less strong overall. It's better to care for them and bond with them yourself.