I agree.I'm not adding the qualifier. I'm going from what he wrote about kids being able to do things properly without input from adults, and adults basically messing things up.
At that age, I was probably swinging baseball bats and tennis rackets. My dad gave me some coaching on both, so I'd be able to do them at least somewhat correctly. That's about all that's needed when a kid is just playing around with them like that. If they're going to do something for 30-60 minutes straight, and the point is to introduce them to an activity, they should be given some marginally competent input. That is for both safety reasons (if there's any safety concern, and I think there is some reason behind that concern with repetitive punching for that long) and so they are actually being introduced to the activity, and not something vaguely related to it (see my earlier post about gymnastics).
To me, the best case here is to have an instructor from a local martial arts program teach the class. Next best, give the leaders some actual hands on training and instruction to coach them safely. Third best, a detailed lesson plan, probably including videos if possible, to show the leaders how to teach the material.
But what this seems to be is "here are a couple coaching cards and activities to do to earn the badge." Insufficient, and too much wiggle room.