I'm not understanding your point re: cars vs phones. If we allow 3rd parties to produce parts for cars, why can't they make parts for phones where the stakes a

I'm not understanding your point re: cars vs phones. If we allow 3rd parties to produce parts for cars, why can't they make parts for phones where the stakes are much lower? Perhaps there's a market for low-end replacement parts for phones? There certainly is for car parts.