It's a great point. At 36, Steve House released a video in 2006 about all his climbing equipment (someone talked him into it.) https://www.youtube.com/watch?v=UCKK-e4gVVA (reupload) I thinked he helped a lot of people with that video in the super competitive world of mountaineering. This was after a legendary ascent of Nanga Parbat. May well have shot himself in the foot but also cemented his status as YT was taking off at the time. Moreover, I think he likes/liked teaching.

A year or two ago there were some very precise workflows documented here. The reluctance now would mark the transition away from "sharing helps me" to "sharing hinders me" ...it's an interesting topic. Sharing with strangers may be the problem because the favour will never be returned - at least not in a direct way. But, metaphysically according to natural laws it might be. Because sharing a valuable secret openly is such a powerful way to express abundance. It grants someone followers. It also prevents people from filing a patent on it.

4 years later House survived a 25m climbing fall.

It's all about one's internal motivation. "Those that can, do, and those that can't, teach."

Well, what happens if "those that can," actually teach?

Just imagine if all sporting stars shared their secrets.. what would happen? Secrets just occur naturally, if you don't share, they'll likely be stolen unless protected - and that requires effort too.