I think you acquire much tacit knowledge by doing explicit practice. You practice and get better even though you don't really know why. The knowledge you gain t

I think you acquire much tacit knowledge by doing explicit practice. You practice and get better even though you don't really know why. The knowledge you gain then is not explicit, it is tacit. Of course if you have a great mentor so much better. But this reminds me of the medieval guild system. You had to be an apprentice, you had to be an intern for many years. The thing is, highly skilled people could make their main goal to teach others. But economically it makes more sense for them to use that skill themselves. Therefore we can speculate that a lot of tacit knowledge remains tacit because those who posses it don't want to share it, without good compensation, like having an apprentice who works for them for many years.