Basically, your premise of argument is false.Those that can't do, teach.
Concept is much different than execution. I can watch brain surgery videos on YouTube all day long, doesn't mean I should buy a surgeon's kit and start tinkering around.
You're assuming that I want to do the job of a surgeon.
If a golf guy like Todd Haley can become an NFL headcoach and OC, a football fan can learn enough about football to understand a fair bit how it is played.