Earlier quoted context omitted.
“Legit service” stores actually can get the genuine parts and software though. This mainly affects DIY repair.
So, the problem is that you cannot reliably obtain genuine spare parts, not that alternatives exist, right? Also, there are more people taking their devices to "non-legit" stores than people attempting DIY screen repairs. Also, how on earth is bricking my phone (that I paid for) a more desirable outcome than letting me use an inferior display (that I paid for)? Also, what about all the cases where fake replacements a…
The FaceID one seems legitimate as a malicious faceid sensor could compromise security. The truetone one looks like total rubbish and should be fixed. And the non genuine messages are useful.
The problem is not you knowingly putting in a non genuine part. It's that a disappointing chunk of repair stalls and almost all online parts are non genuine and essentially fraud as they advertise as being genuine and better than the original parts. Often they are recycled parts from used / stolen devices which are worn out before you even get them. There are even stores in 3rd world countries which will remove genuine parts from your phone and replace them with fakes while doing something like a battery replacement.
The non genuine message protects the customer who gets their phone repaired. It also protects the second hand buyer so they can see that the whole phone is genuine and no bad parts are used. It also protects the phone owner by making theft less valuable as the parts can not be used to their fullest.
So I totally understand the issues with DIY repair here, but I also see all of the other issues at play. The main issue I see is that Apple does not do repairs on certain parts of the phone like the lightning port so if those parts break, they won't do anything for you. I'd like to see Apple and governments work together to find a solution that ensures users get maximum repairability while still being protected against part fraud. I'd like to see Apple have some open dialog with the public and governments about exactly _why_ each restriction is in place, what problems they face, and why they have to do things this way.