It really isn't. Unlike John Deere, Tesla is actually pretty good on right-to-repair. All of their technical and repair manuals are available for free to anyone. The service/diagnostics software ("Toolbox") is also available to anyone, albeit for a (not entirely unreasonable) fee.
(There is also a service mode built in to the car which can do many basic diagnostics for free)
That should be the bare minimum. Ford charges you 40 dollar an hour for it and unless you know exactly what you are looking for you will spend several hundreds on it.
Too bad ford killed their old site, the print form was unauthenticated and you could print the entire schematics to pdf if you knew the internal model number. Or do what I did and run a script to dump it to higher res PNGs.
More legitimately, alldata.com has repair data, workshop manuals for most marques up to today and will sell you either single vehicle (called "DIY") or a package aimed at independent mechanics where you can access anything. Same manuals either way, but you pay per vehicle with DIY (and have to contact support to switch.)
I use alldata for my GM truck, it is fantastic.
I won't go into details but searching around with the "forum" keyword and etis might get you somewhere (at least that did the trick a few years ago, now with LLM slop I don't know, and what the other person posted).
As others have pointed out here, other manufacturers like Ford and Toyota still charge for access to their manuals, even in Massachusetts. Tesla gives free access to anyone, worldwide.