It increases the difficulty to repair by adding accidental cost to repair shops. It also makes using aftermarket parts harder. In the end, it's about revenue f

It increases the difficulty to repair by adding accidental cost to repair shops. It also makes using aftermarket parts harder. In the end, it's about revenue for the OEM's. Quicker, more expensive breakdowns leads to buying new cars faster rather than repairing old ones. Those sorts of things are business choices, not engineering ones.