Interesting point. One difference: It is easy to tell if a tennis instructor is giving “good” instruction, where good means instructions that help you be a bet

Interesting point. One difference: It is easy to tell if a tennis instructor is giving “good” instruction, where good means instructions that help you be a better tennis player. You just look at their students. If you want to know if they give good fundamentals for long term growth, you look at their much older students. How do you know if a meditation teacher is giving good instructions? Seems much harder to me. It is interesting that many of the traditional religions have hard to quantify benefits. Buddhism offers a personal inward help, and the abrahamic religions often benefit communities.