When you choose to join an organization, it doesn't make you a better person.
You pick the type of organization (for example a club at college) that has the kinds of people who are already more like you than the general population.
This allows you to not change who you are, and to just become more.
A kind of personality echo chamber.
Comforting, but not challenging.
The way we grow as humans, and the highest performing organizations, are ones with lots of different people thrown into an organization together with no way out.
Because there's no way out, they're forced to get along, and that challenge helps individuals grow and also the organization to become high performing.
Ideally it's an organization that the participants think is important enough that they can't just quit as soon as it gets a little hard.