In the event of an accident: request medical attention or not?

In a narrow winding valley in southern Germany I was overtaken by a fast motorcycle group with the PW. Because one of the motorists drove frontally into a rock wall, I caught up with it again after a few minutes. At my discretion, the movement of the injured motorad driver was disturbed. Since in the valley no mobile phone reception was possible, I offered to drive out of the valley and request an ambulance. The motorcycle colleagues vehemently rejected this and did not do any institutions the same. The next day I read in the newspaper that the motorcyclist was still dead at the scene of the accident, which kept me thinking for a long time. Last month I was accidented on foot in Germany myself and there was suspicion of skull and spine injury. The ambulance was immediately requested by third parties without question. I was then informed about this. rt. The investigation by the paramedics showed that although I was injured, I did not need any transport to the hospital, but only a surveillance of the condition by another person for 24 hours and the further transport by a taxi. What about the costs of the paramedics? I was told that a justified requirement of the paramedics without subsequent transport in Germany was free of charge. (Whether this is always so, I did not check.)This would mean that there is no need for a medical examination. allow for cost reasons to delay or forego the provision of medical equipment.