Do you also support cars only being allowed to be repaired at specific dealers, only using tires sold through the manufacturer with a 30 % cut? Luckily this is illegal in most of the world. In the EU I can change the battery, tires and oil and the manufacturer can't deny it or remove the warranty. With an iPhone i can't even have a pro technician work on my phone without Apple taking away warranty from me and calling the cops on the technician's shop for importing refurbished Apple parts. They will be either forced to open up or they will be split up in tiny unrecognisable pieces.
You are stretching equivalencies here pretty hard with regards to capital investment of a product vs. expectations but I'll play along.
If I was told this plainly and openly up front then I wouldn't buy the car to begin with -IF- that is what I value in that specific vehicle. My car? Not a chance, I like my sports car and working on it is part of the fun I get from it. My wife's people carrier? If those repairs are close in line with other repair shops even after the 30% AND they'll come pick it up or tow it so I don't even have to mess with it? Absolutely, where do I sign up? Different tools have different uses and value propositions.
A better analogy is a resort. It's got beautiful beaches, gets the top acts to perform at the club, and the food is Michelin 3 star. The resort has armed security, so no one needs to worry about being mugged, or having their rooms robbed while they're out clubbing. The resort decides who can sell food, who can perform at the clubs, and who can teach you how to surf at the beach.
