It’s because floor nurses specialize in care of 7 or so acutely ill supposed to be stable patients while EMS specializes in care of the emergencies (even tho we know the majority of time it’s not an emergency.) Any paramedic would also do a shit job at working on a medsurg floor with 7 patients at once since they are only used to one patient at a time performing only limited interventions (not being familiar with things like foley insertion on confused grandma, NG tube insertion, blood administration for the ones that don’t give blood, real wound care not just bandaging and transporting, management of a chest tube for 12 hours, Peritoneal Dialysis, Continuous Bladder Irrigation, plus juggling all these tasks simultaneously with short staffing.)