Modify a dishwasher and now it fills your kitchen with soap bubbles? Modify a CPAP machine and get killed by it? Not the manufacturer's fault.
The US is too litigation happy as it is...
Without clear quality and regulatory control there must be an objective method to discern between personal repairs and non-personal ones.
Disclaimer: didn't read the actual right to repair being passed in detail. Not sure if it does discern already.
To really fix it we need a non-profit group to be in charge of the certification, preferably one who can be held accountable for failure due to their certification. My removing the incentive for profit we make it so the Medical industry won't try to control it, the insurance industry to mitigate their requirements, and government from trying to have political agendas pushed.
I have more that I would love to put in here but my employer has opinions that might differ from mine, and can be directly involved with some things that the law can impact.
There's no legal requirement in the US federally, or in any state I'm aware of, to have any certifications for general automotive repair. The EPA does require it for working on air conditioning systems, though. [0] However, many employers do require certification and/or will assist in getting the certifications. Some of the smaller shops are more likely to have mechanics without certifications or with expired certifications (I believe ASE certs are five years). ASE does require hands on experience for their certifications in addition to the test, though. [1]
The BLS also describes this, probably better than I do. [2]
[0] https://www.epa.gov/mvac/section-609-technician-training-and...
[1] https://www.ase.com/work-experience
[2] https://www.bls.gov/ooh/installation-maintenance-and-repair/...
That's not nearly nuanced enough. Manufacturers should still be responsible unless they can prove you caused the failure. We currently require this standard for something as simple warranty coverage, we ought to require it for something as severe as death.