This prevents a lot of illegal/unauthorized repairs from happening. It also ensures users are going to the retail stores or authorized repair centers for repair.
It is not illegal to repair or dismantle anything you OWN. Period. And you don't need AUTHORIZATION from Apple or any manufacturer to open said product. Period. There are billions of examples of people doing their own car repairs, tv repairs, computer repairs, appliance repairs, etc. Some repairs need a high level of expertise, some do not. I easily change my oil and air filter in my car but I certainly do not muck around with all the belts. And there are bazillions of people who swap out/change/upgrade their own ram, hard drives, dvd burners, video cards, etc. on personal computers.
For each and every iPhone manufactured, i'm sure apple wants to keep a running record of all and any repairs... illegal repairs do not add to a manufactured unit's service history.
Fine. Sure. Apple would love to have a record of all repairs...it does help Apple identify problems.
apple wants to build a flawless device. when other people are servicing the product w/o providing the manufacturer a diagnosis and repair history, apple loses this vital information. This information is extremely valuable for any kind of manufacturer.
You've been drinking too much Koolaid. Apple doesn't need 100% of all problems reported. All it needs is a spike in people complaining and service centers sending back defective parts to realize there is a problem. Again, you have been drinking waaaaaay too much Koolaid regarding Repair centers and manufacturers.
Apple simply wants to stop people from UPGRADING or ENHANCING the iPhone (such as a battery or maybe a SIM card or maybe a larger memory chip)...not
repair it. Other than a battery replacement, I doubt there is any other "repair" that even a highly skilled tech would want to do on the iPhone. If it's truly broken, bring it back and let the experts fix it (maybe even under warranty) and get a WARRANTY ON THE REPAIR. Or buy a new phone.
I agree that Apple has the right to build their products the way they want. But this is really crossing the line by choosing a configuration that is non-standard and unavailable to the general public. Torx screws are more than adequate for the iPhone.