You couldn't imagine being forced to only get service at your dealership, and you don't: you buy a car that isn't like this (which today means you don't get a Tesla).

I'm sure your attitude isn't that unusual; a decent portion of the general public is savvy enough about auto repair to know dealerships are a big rip-off.

However, much of the population doesn't think twice about getting this treatment from Apple, and are happy to buy their iDevices, even though there's viable alternatives for all of them.