I don’t see how they could possibly warrant self repair. There’s a hundred ways you can mess up your device while attempting a repair, and they’re not going to pay for your mistakes.
Unless, of course, a way to remotely verify no damage occurred to the device while repairing it existed, which isn’t the case.
Ok yeah I can budge on warranty, but recall? If the part is flawed from the get-go, who cares if it was "broken" during a repair? Under recall it was clearly broken or bound to break imminently (assuming Apple can verify that the part was OEM).
And if Apple doesn't want to do the repair themselves under recall due to 3rd party repairs, sure, just send me the part and I'll do it. One part per phone. Just don't tell me to pound sand and eat the full cost of part+repair. Sounds straightforward, though perhaps there's something I'm missing.
Unless, of course, a way to remotely verify no damage occurred to the device while repairing it existed, which isn’t the case.