Perhaps training those who are already stationed (forest/park rangers, etc.) would be a more efficient path. I think the point of accessible trained staff as opposed to a mushroom club is to target those who would otherwise not take the effort to investigate what they gathered, and end up consuming harmful species.

Call me cynical, but stopping someone from eating some random unidentified plants/mushrooms seems like a net harm to humanity.

You're cynical.

You can give a man a fish, or you can teach a man to fish.

Or you can tax a third man to pay for a second man to catch fish for the first man.