Suburban and urban places can live with BLS care support for the 10-15 minute drives to the hospital. Ultimately, its getting to the hospital as quickly as possible that will save those critical patients.
While time is a factor and should not be under appreciated in context of the larger clinical picture the American mentality of throw everybody on a spine board and race them to hospital because that is what our poorly written textbook told us to do is not really the best approach.