I've taken to using an untrained villager to bang the gong. The hope being that if the effect is bad it can't do too much harm to the gong-ringer. Even if he's killed the loss is less. Twice running I've had "The gong grants wisdom". The first time the villager became a Master Scientist , which is fair enough. The second became a Master Parent.
I had a couple of days of travel so today I rang the gong and it took health. But - I do now have a 2-year old that is probably already an Adept Doctor. I'll take that as a good one! LOL