I can see it both ways.
You pay for your device, you’re responsible for the parts. HOWEVER, if you allow non-certified technicians to install third-party parts in your phone, and it breaks, YOU’RE responsible. Not Apple.
Apple disapproves of repairing your own device for the reasons above, so they recommend you to take it into an Apple Store so certified techs get it done the right way (even though the costs can be ridiculous).
What Apple should do, in my opinion, is support more "authorized retailers” by training them and supplying OEM parts. That way, it makes everybody happy.
You pay for your device, you’re responsible for the parts. HOWEVER, if you allow non-certified technicians to install third-party parts in your phone, and it breaks, YOU’RE responsible. Not Apple.
Apple disapproves of repairing your own device for the reasons above, so they recommend you to take it into an Apple Store so certified techs get it done the right way (even though the costs can be ridiculous).
What Apple should do, in my opinion, is support more "authorized retailers” by training them and supplying OEM parts. That way, it makes everybody happy.