Earlier quoted context omitted.
Car safety is a bad counterexample because the risk is otherwise often externalized i.e. your car can easily hurt a total stranger whereas the consequences of your choice in laptop are strictly personal. And as GP stated, regulating this sort of thing would definitely force a particular trade-off on everyone. A lot of people would be pissed to have MacBooks with worse "build quality" even if they were more reparable.…
I disagree. The lack of repairability has external costs not born by the purchaser or the manufacturer -- more toxic trash unnecessarily added to the environment. Forcing a particular trade-off on everyone is entirely the point. It's the point of car safety, it's also the point of minimum warranties, electrical emission regulations, safety standards, etc.
That "what if" cost is going to be built into the cost of the laptop. Repairability doesn't always keep the cost low. The purchaser will definitely have to foot the cost otherwise it isn't sustainable.