The car main dealership and a back street garage are 2 completely different business models. Overheads and stock levels are huge in a main dealership, a lot of which are franchises. That servicing charge has to pay for the swish offices, forecourts, receptionists, salesmen etc etc.
The back street guy has his garage and maybe a few staff. They usually need to do little advertising. I take my van to local garage and car to main dealer.
Do you think for one minute the main dealer worries about the back street guy taking his work, not on your nelly.
Likewise with carpet cleaning the guys making the good money don't worry about the competition they just get on and run their business.