That's another cost. So on top of the thousand dollar phone I now have to buy ~$150+ in cases (which are dubiously effective) and insurance.
Instead I buy a ~$200 phone (which is just as good to me than a $1,000 phone) and when that one breaks I get another ~$200 phone.
I don't care about a broken screen though, if the screen cracks then I'll just use it until the phone isn't functional anymore.