Medicine is a dynamic field built up sound scientific principles, and when new treatment modalities come out the physicians are expected to be able to grasp these concepts by relating to previously learned sciences. As the physicians get to play with the new toys and new treatments, they toss the bone to the Paramedics who in turn are expected to learn the new concept and be able to use it. Capnography, 12-Lead EKG, Blood glucometry, SpO2, IV Infusion pumps, Mobile Data Terminals, and a myriad of other biomedical technology is widely used in ground and air ambulance services. By knowing the basic science behind them you are able to learn more advanced equipment- ventilators, IABPs, and maybe someday in a near distant future artificial blood products, etc.
Try attending one of those EMS Expos where Zoll, Phillips, Physiocontrol and other leaders of prehospital equipment demonstrate their latest products.
To answer your question, it directly relates to my ability to acquire the training and subsequent use of such technology. If I cant use it, then I lose another diagnostic tool, which may be detrimental to the patient (as an example - in NYC only a few hospital-based ambulances even carry glucometers and CPAP).