Certainly, this is why I've not made a universal claim above. I have indeed partially rebuilt a couple cars. I generally support right to repair. I recognise that anything against that is anathema here but there's some cases where we need to be able to make exceptions.

Someone buying a refurbished powerbank, for example, may end up lighting something on fire because it was repaired incorrectly.

Yes it'd maybe be on the manufacturer of a replacement regulator if an insulin pump was 3rd-party repaired and failed, but would it maybe be safer to say that the device should be modified or repaired only within its certified supply chain?

There's CE and UL listings for communications and electrical devices to in part protect consumers against poor manufacturing leading to irradiated or electrocuted people.

Could we agree that there's a difference between a bushing and a microcontroller?