A WFR course will go into everything from Patient Assessment (scene safety, taking vitals, etc..) to Basic Life Support (CPR, OPA/NPA, etc...) to Traumatic Injuries (bleeding, shock, fractures, spine injuries, etc...) to Backcountry Medical Problems (Diabetic emergencies, allergies/anaphylaxis, respiratory & cardiac emergencies, etc...) to Environmental Medicine (dehydration, heat illnesses, hypothermia, frostbite, altitude illnesses, bites & stings, lightning injuries, etc...) to Micromedics (dental, eye, ear, skin, sun-related problems, etc...). Very little of this will require daily practice if you learn it right the first go around, and it will come into play in way more situations outside of the woods than in for most people.
Telling people that CPR and a TQ is all they will need is pretty ignorant when there are more things than trauma that can kill you out there. I always encourage people to get as much medical training as they can, knowledge doesn't weigh anything in your pack and it may not be your own emergency that you have to deal with.