Hamil,
A rapid depressurisation is a serious event. Not all passengers are able to put on their oxygen masks. Not all drop down as they should, and the elderly, young and infirm will not always put them on. To then put them through additional, unnecessary unpressurised flight at 10,000, exposing them to further oxygen depravation for the sake of keeping the Company happy, is not only irresponsible but dangerous.
Hospitals are not much help to you if you are already dead.
