I don't drive much and cars aren't a symbol of status anymore in my generation. So I have a 1000$ car (significant upgrade from my previous 500$ car) that gets repaired by a friend. It is extremely cheap for me. While I am by no means a car mechanic, attaching another piece of metal or exchanging some parts can be quite fun.
But repairs are simply not possible, even by qualified mechanics if they don't have access to proprietary diagnostics software that you sometimes need to just reset some error state. Of course a 0.50$ sensor also does cost hundreds of dollars if you need to get them from the manufacturer. The small circuit attached to the sensor supplies power and DRM. It would probably cost another 0.50$. The guy that blew up his Tesla was right, although Tesla isn't even the worst offender. The car industry is full of this shit.