People want to be in their own fashion tribes, so they want to wear the same clothes to be connected to everyone else in that tribe. But they want to be different from other tribes.
Leadership is particularly necessary to ensure ready acceptance of the unfamiliar and that which is contrary to tradition.
Every theory presented as a scientific concept is just that; it's a theory that tries to explain more about the world than previous theories have done. It is open to being challenged and to being proven incorrect.