If it were me unconscious on the floor, I'd take a pediatric neurologist that "hasn't done hearts" for 20 years over a flight attendant with 8 hours of "first aid" training.
I remember a friend who became a paramedic. My home state brought in ambulances-for-everybody. If you wanted an ambulance, the dispatcher couldn't say no anymore, you got an ambulance. And for people on low-income cards, those ambulances were free. So my friend got called out to a lot of junk calls (his term: "coughs, colds, and sore holes"), and said that it was a problem for the paramedics because their skills rusted - some paramedics reported only seeing one heart attack in a year, and they have to pause and think what needs to be done again.
Medicine is very much a 'use it or lose it' discipline, at least when it comes to the details.