Tesla has no problems with you or anyone else doing repairs. The schematics and service manuals are free to anyone. Now some people are not qualified to do high-voltage repairs and for that reason, Tesla does have some small restrictions on select parts to reduce homeowners from killing themselves. Even those procedures for HV repairs are documented.
So I guess you have problems with all those other companies, but I don't think you should lump Tesla in with them - since anyone can do Tesla repairs.
There are already some independent shops that do Tesla repairs such as Gruber Motors, 057 Technology, and Electric Garage.
On the contrary, Tesla does everything they can to prevent people from doing any service to major components on these cars, despite the good PR of providing some service information publicly nowadays.
The only reason my shop can do what it does, for example, is because we've put in the effort to reverse engineer so much of the vehicle in order to find workarounds for Tesla's stonewalling on repair and modification. Nearly nothing we do is thanks to any official Tesla tools or service info. We made pretty much everything ourselves, from scratch, and not just because we started doing this well before Tesla released any service info at all.
Tesla doesn't want these cars repaired. They want you to trash it and buy a new one. The salvage recertification "inspection" is a complete joke, as illustrated well by the anecdote above that tracks well with what I've seen for many people. Some make it through their process, but almost always at some ridiculous cost beyond the inspection fee for one convoluted reason or another. The company culture seems to shun service folks who are allowing salvages to pass the inspection. Not directly and openly, but there's a clear trend there.
Suffice it to say Tesla is one of the least pro-consumer companies I've ever dealt with. And that will continue to be the case until a customer can walk into a service center, give them the part number for a major component (battery pack or drive unit), pay for it (reasonable cost), and drive off with it in the back of a truck no questions asked............... like pretty much every other manufacturer.