What if my aunt had three wheels?

I don’t see the value in hypotheticals like that. If the claim is that a computer is not really a computer unless every user can do any low level operations they want, is it also true that a car is not really a car unless every user can do any low level operations they want?

Manufacturers are taking away right to repair too! I think you picked a bad example. Back in the 60s you absolutely could change every low level component on a car.