> TPMs don't impede your ability to repair anythingThere are some stories like this: https://www.vice.com/en_us/article/akw558/apples-t2-security...
It's suggested that many such devices might be stolen. But there will also be devices where the user forgot to wipe their data (or didn't know how); or devices that are only just damaged enough that you can't wipe the user data.
Probably an official Apple store can refurbish them somehow, but that is the NOBUS / EARN IT argument.