>The idea that a carmaker would purposely engineer flaws into core engine components in order to drive future sales doesn’t make much sense.
You need to realize modern business revolves not around one-and-done, but around recurring revenue streams. To the "business minded" the only thing that doesn't make sense is leaving money on the table.
Selling people grenading engines is not a great way to build recurring revenue streams. And building performant, efficient, and reliable engines is hard enough without intentional sabotage
Nevertheless, as long as everyone else optimizes to the same metrics (minimized Bill of Materials, and building for assembly, not service), it may not be great, but it undeniably works.
You need to realize modern business revolves not around one-and-done, but around recurring revenue streams. To the "business minded" the only thing that doesn't make sense is leaving money on the table.