Except iPhones are not "easily breakable." That is simply not true. Obviously any thin light computing device will be breakable, bendable, whatever if a user is dumb enough to apply grossly inappropriate force. But overall iPhones are durable as can be. I beat my caseless iPhone Pros up pretty good and they survive just fine.They are running a racket, plain and simple. Their encasing the device in glass is a GRIFT to make it easily breakable and hard to repair. It's the same strategy with their macbooks.
Imagine if every time your car broke down or you got a flat tire, you had to pay almost the price of a new one to get it repaired. That's probably what the Apple Car would have been like--wheels/tires sealed and non-user-replaceable etc.