It would also make recovery of stolen devices easier. Refurbisher has Apple contact the owner, owner says it was stolen, person gets their equipment back.
I don't see the downside here, literally everyone gets what they want - people can sell or dispose of their old devices as they see fit, refurbishers and third-party repair shops can get parts and devices they need to run their business, Apple gets to continue touting the security of the platform, and victims of theft have a better chance of recovering their often expensive gadgets.