I see your point about only having Apple repair your iPhone. They are the experts since theory designed and built and sold you your phone.
But isn't it a little too over the top?
No, the average consumer wouldn't know what to check inside an iPhone or for that matter what they are looking at.
They'll probably just marvel about all the stuff in there and wonder how they get it all into such a small package.
What if you just wanted to open and repair your iPhone?
What if you paid full price for it and it was not under contract and well just wanted too fix it yourself?
What part do you want to fix yourself?
You can still do that if you are technically inclined, although it isn't easy, but that wouldn't discourage a tinkerer.
Should you be allowed to?
You are allowed to do anything to that phone you want to.
What if you just didn't want to take it to an Apple store or there wasn't one within hours of you?
Mail it in.
What if someone could do it better and cheaper?
Go there! Plenty of service providers online.
What if all car manufacturers made their cars so that ONLY a dealership could repair your car? No matter how old your car was or what was wrong…..only the dealership could repair it. What if car manufacturers made cars tamper proof? What if they made them so that only the deanship could repair them……..and charge whatever they wanted to repair them?
I have fixed (and wrecked) many an Apple product since 1984. Besides getting parts (headache) and manuals, I don't see where there is a benefit for Apple to get involved with making DIY repair products.
The dumb stuff people do (Say repair a product with electricity plugged in, open laser products) cannot be controlled and the legal issue alone (Um, there was no warning sticker telling me not to stick my finger in there and now i's missing) is worth controlling product access.
And sorry, if I don't get why they should cater to a minority.
Anybody who is really good at this or wants to try can repair their own iPhone with iFixit and Youtube support now.
As to your car analogy: Anybody who "repairs" cars is usually trained and does it for a living and knows what they are doing. (one hopes)
Although I could , I don't fix my brakes. Since I don't do it every day I do not have the tools or know all the ins and outs. Why would I want to learn something for a one time task?
And, let's not act as if an iPhone needs to be repaired every five minutes.
After many iPhone generations I have checked and thought about broken glass repair DIY. (Easier done at a mall as I wrote) and battery replacement.
Maybe a dead home button spring, would be okay to replace, but then again the effort to get parts and not being that expert never makes me do it.
There is another benefit to having it repaired by Apple. They check all of what is sent in and sometimes give you a good deal when replacement for an out of Apple Care product is the last option.
They are very generous (at least have been with my family).
For those with DYI repairability important, just don't buy Apple products.