If you modify a Ford truck and that modification kills you, you're liable.
If you modify a John Deer tractor and John Deer didn't do everything in their power to stop you from making an unsafe modification, they're liable.
Furthermore, if a farm worker gets killed, maimed, injured from the framer's modification, the farmer is immune from liability and it is still John Deer that would be liable.
https://nationalaglawcenter.org/workers-compensation-for-agr...
> Whether or not someone is eligible for workers’ compensation depends on their state and the industry they work in. There are no requirements at the federal level that mandate states to have workers’ compensation laws. Nevertheless, every state, except for Texas, requires most employers to carry workers’ compensation insurance. However, the majority of state workers’ compensation laws specifically exclude or limit agricultural employers from the workers’ compensation requirement.
Industrial operators who modify their equipment are not children, they should be responsible for their actions and trusted to repair it.
Pay close attention to the standards section and the verdict allocation of case study #1.
> Farmer, arguably the person most at fault, is essentially immune from liability. This would be true in most states due to Workers Comp
> Jury cannot attribute % of fault to Gonzales because he used Employer's equipment. This would not be true in most states.
> Jury wishing to give Gonzales "something" has only Bush Hog and Massey Ferguson to fault. Cannot do a % reduction for fault of Farmer or Gonzales
Even in this case, one of the lines of argument seems to have been that the manufacturer was aware of pre-existing safety issues and injuries, yet did not recall the product or adjust its design. That's certainly different than a one-off unauthorised modification blowing up.
I suspect that the argument that gaming consoles made was that it is necessary for them to be able to restrict access to repair because failing to do so would make them unable to enforce intellectual property and copy protection on their equipment as required by licenses that they have from publishers.
"This game can only be played in Japan because of {content/licensing}". Enabling full repairs would mean that someone could more easily modify their device to present itself as a Japanese version and now the company and maker is liable for content that is allowed in Japan but illegal elsewhere.
Again, this is an "I suspect" - I don't know for sure what argument they're making - just trying to channel the mind of the corporate lawyers (which isn't an entirely pleasant way to be thinking).