I’ve always thought it would be a good thing if the airlines could run a real basic EP/famil for interested pax occasionally, to experience such things as how easy/difficult it is to open a OWE hatch, where to stow it and other useful such stuff. They are, after all being expected to perhaps sometime perform a serious function for the airline, and an emergency situation is not the best time to first experience something.
On completion of the famil an individual could be given an “endorsement” of sort to be reflected in their airline club membership profile, which could give them seating priority in the exit rows.
I’d rather have someone there who has a bit of familiarity with what's required .....