IMO, that's the same sentiment that comes up in the app store tax threads. Some Apple users say they're willing to pay more, but the reality is they're being subsidized by the users that don't need or want those features.
In the case of device repair, I don't see an issue with locking the phone as perfectly as possible from the factory, but once I buy it and own it I should have the option of putting it into some type of repair mode where I accept the risk of having it repaired with 3rd party parts.
If you want to pay 2x or 3x or whatever's needed to make up the difference that's fine by me. Just don't make me participate in that system because I don't need it.
> If you don’t like Apple’s approach, use one of the other brands instead.
There's not a manufacturer in the solar system that's going to forgo the use of parts serialization unless it gets prohibited with legislation. The money to be made by locking out competition is too appealing.