All emergencies are time-sensitive. What is and what isn't done between the arrival of first responders and arrival at the hospital could spell the difference in the severity of the outcomes faced by victims of life-threatening events. This is why pre-hospital care or immediate life-sustaining interventions are so important in improving the outcomes faced by those who are victims of disaster. It's because in many cases, many adverse outcomes and even prolonged hospital admission can be prevented with adequate pre-hospital care.
Unfortunately, in the Philippines, good pre-hospital care is scarce if not absent in its many rural provinces as evidenced by the documentary Ambulansyang-de-Paa. Many factors contribute to this deficiency such as the natural lay of the land, lack of traversable roads for vehicles, and even the municipial budgets as allotted by the national government. Consequently, millions of Filipinos die before they even reach a health center, let alone a hospital when they could have been saved by an efficient, and working emergency health service system.
In this way, pre-hospital care is important since it delays the progression/improves outcomes of life-threatening illnesses, and improves the access to health care by providing immediate life-saving care and transportation to better equipped facilities for those in emergency situations, assuming of course that these systems are functional and accessible, which they aren't.