It's the human version of the most common form of organisation. Lion prides, baboon troupes, bison herds, wolf packs. It's the same concept: getting together to pool resources and knowledge to have a better life than going it alone. Most of the problems come from human fantasy. It won't make everyone overflow with rapturous joy every moment of every day. It won't be a cakewalk. But the collective power of a group of likeminded people working together has a 'greater than the sum of its parts' effect. As long as it can be maintained, it's better quality of life than being alone in the world and freer than being part of a large scale society. Its only weaknesses are the primary reasons so many people don't live like that: human unsatisfiability and military weakness. Even if you start with a great group, to maintain it you need the next generation and someone always is born or introduced who doesn't hold the values of the group, and wants the group to change to suit what they want. And if it doesn't self destruct, its size is limited, and can be conquered by a larger group focused on the values of their 'leaders.'