>Tesla‘s are literally killer machines.
So are all cars. Under-skilled people routinely (and legally) repair and maintain the systems that make these vehicles drivable (brakes, steering, suspension, etc).
Some folks are killed in doing so, much like any activity, but not any number that is out of proportion and typical with any activity where small mistakes can cost lives.
>There is a reason why you are not allowed to do wiring and a lot of electronics in your house by yourself.
That's not true in many places, much of the United States included. Only inspection is mandatory in most cases, barring specific regional laws. Again : Those that do their own work aren't just dropping like flies. A few accidents occur, but nothing of any proportion to require legislating more strict laws regarding such things.
>I can understand why Tesla does not want to take that risk.
My understanding of why Tesla acts the way they do has nothing to do with the complexity in their systems and danger in working around such complexity, but rather their interest in more protection for their IP, their desire for keeping customers within their own 'walled garden' of service options, and for controlling public perception of their product, all to the disservice of the customer (much like John Deere's behavior these past decade or two).
We aren't strangers to 'killer machines'. This isn't any new phenomenon. It's being framed that way by some to rationalize over-protective and controlling corporate behavior towards the consumer, and Tesla isn't alone in exercising such power.