Which isn’t really a defense of current practices, but I can definitely see how things broke down. McDonalds corporate might actually prefer it’s franchises to be stuck with such a poor deal simply to minimize risks.
Imagine if your house, could only be repaired (electric, plumbing, etc) by one corporation that is friends with the real state agency that sold you the house. Yes, electric DIY it's a bad idea, but you want the option to hire another trained / certified professional to do the job, maybe because price, quality, speed or reliability. Monopolies have the tendency to end bad for the user.
Their PR of the "one and only" company to do "safe" repairs, and that 3rd party are dangerous it's a lie. Other fast food restaurants are proof of this, they use the same machines, but can hire other companies to repair them, so they have much less downtime.
Edit: Fixed typos
Replacing an old plug for a new one with USB, sure why not DIYit. Messing around with the breaker panel to add an electric car charger or an HVAC connection, my recommendation would be to hire a professional.
The main issue with AC electricity it's how easy is to learn the basics, and get overconfident because you got something working fast (sadly here I can talk about myself). But not knowing things like the NEC Code makes a difference, and that's when you want a technician or get into the rabbit hole of learning this deeply.
Simple details as ignoring the color code, not using the right AWG for the job, can easily cause a fire, or a hidden dangerous electric shock for future maintenance, making the installation a ticking bomb.
Again, the right to repair should not be confused with "anyone can do repairs", but having the choice of hiring a 3rd party professional to do the job (or do it yourself if you have the training) outside of the original vendor.
Show me any actual data that people being able to see human readable error codes would result in more injuries.
Even if that were somehow the case, demonstrate that the status quo would be less dangerous than putting the company in a position where it had more of an incentive to make ALL repairs safer. If a repair process is hazardous enough to make the machines barely safe enough to use if maintained by authorized repairmen, than that status quo discourages the company from making the repair process safer in general.
Much like the right to repair the problem here is that the manufacturer is lying, it’s just that the lie is slightly different.
If you repair a car you can go to most mechanics, not just to the manufacturer. Everything else is monopolism
Because it doesn't take a genius to understand cleaning needs to be thorough, and the authorized cleaner isn't employing the best and brightest with CEO level salaries.