there is no such thing. if you are legit, you take the time and effort to properly train the staff on repairs that the customers want you to repair. Imagine a BMW repair where the technician didn't know what the f he was doing, because he didn't have he tools, manuals, parts and training to do the work. So get legit or quit
Wrong.
Now imagine an independant mechanic, who had the skills to work on BMW cars, who was perfectly competent to repair BMW cars, and obtained genuine BMW parts. Let's say that he wanted to replace a part on a customer's car, except BMW have made it so that only they can install a genuine BMW part in a BMW car, since the car's engine management system checks the serial number of the part, and if it doesn't match, the car refuses to start. BMW only provide that software to their authorised garages, who, of course, charge 3 times what that independant mechanic does.
It's anti-consumer behaviour, plain and simple. We wouldn't accept it from other companies, so why do we accept it (and in fact, some people *praise* this behaviour) from consumer electronics companies?!
Now let's step back and say that that independant mechanic could, in fact, become authorised to get that software, if he signed a contract which many in the industry have called predatory, forcing them to be at the mercy of BMW for part availability, refusing to do any repairs which BMW deemed impossible. Apple force you to replace the Motherboard and CPU in an iMac when the motherboard failed as they only ship the part in that configuration, even if the CPU was socketed) - this would be like BMW saying "you're only allowed to replace the entire engine + alternator combo when the alternator fails, since that's how we ship the part". It would be utterly ridiculous.
As for the whole Apple technician's know what they're doing better than independants - I've worked as a genius part time while I was at uni. Geniuses get 2 weeks of basic training and that's it. They're taught how to swap parts, not how to physically repair something.
I genuinely, having worked there, cannot understand how anybody in their right mind could defend Apple's repair practices.