There's a big difference between someone saying "I'm a repair shop that is capable of fixing Ford vehicles" and "I'm an official Ford Certified repair shop". Both are
allowed to fix your car. The third party shop can order parts to repair your car.
And nobody curses Ford's name when they go to a crappy shop and spend $2 on a new headlight that fails in a week. That's the shop's fault.
Nobody is saying anyone can call their junk an "official apple product". Why would this not be the same as the car scenario? If you don't want to risk issues, don't go to sketchy repair shops.