They're not talking about making money selling broken shit. They're talking about forcing you to give them a cut every time you do normal service things with the product (something they have much more fine grained control over).
They're angry that Jiffy Lube exists, not that autobody shops exist.
IDK about the European market but US OEMs don't really want to be in the business of fixing things. GM for example DGAF about dealer service departments. They're happy to sell replacement parts and make pennies doing it but they see themselves as being in the new cars and car financing business. When they sell shit that breaks they don't do it so you can pay to fix it. They'd much rather the dealer try to sell you a new car.
Economists have a term for this called "rent-seeking", and even endorsed by society at large at time, such as land speculation and NIMBYism.
This has close parallels to hyperscalers hosting open source software and the authors being salty about to the point of relicensing.