The more abstract the thing you’re teaching, the more credibility you need.
If you want to teach me how to sew, you don’t need much credibility. If you can do it, it follows pretty quickly that you could show me how to do it.
On the other hand, if you want to teach something like “how to live a happy life” you’re going to need a lot of credibility. Unfortunately, many people don’t have a lot of credibility, and of the subset of people who do have credibility with an audience, few are interested in trying to teach others.
What we’re left with are are millions of people who have no one credible even trying to guide them through a value driven life.
Teaching abstraction is hard. Leverage and trust are the answers, but they’re more scarce than ever in a skeptical world.