But I thought changing the wheels was a simple process you could do at home with the tools provided with the car?

A bike pump and a tire shop aren't provided with the car. Hell, most don't come with jacks or a wrench either. Some won't even include a spare tire/wheel nowadays.

Repairs can be pretty easy when you pay someone else in a shop to do the hard part for you.

In my case, replacing my iPhone battery required no tools at all after I paid the Apple shop to mount the new battery in the phone.

money can be exchanged for goods and services?? you tell me this now??