For what it's worth, why would a person have to associate or form an organization to learn how to start a fire, tie knots, stay warm, take care of one's feet, read a map, stay clean, handle firearms, etc.
And especially in today's society, why associate with persons that you may not actually be compatible with, or young people who, unfortunately, are being dropped off by the ubiquitous "single mom".
And then there's the legal liability end of it.
Our dad taught us, and his contemporaries taught their sons, and the boys associated together and camped together and taught each other, and all of this occurred informally in the small towns and rural area where I grew up. Boys Scouts came from the big city.