Answer:
I will give you a blunt answer. Because no one felt significant by making a friend.
Explanation:
The truth as to why being in a clique is different than a developmental friendship is due to what we as people desire. we desire a place in life, meaning, and to feel that we are part of something that is bigger than ourselves. We feel small and insignificant, and while making a good solid friend helps, it doesn't give the naturally desired feeling of purpose.
Think of all of the worst groups of people in history. When one thinks a while the best example of the difference between developments friendship and a clique can be found in the NSDAP (Nazi Party). People threw friends into the clutches of the Gestapo in order to feel part of the "clique" that was the Nazi party. These people felt that it was more meaningful to have a common purpose, place, and important role in the future of this clique instead of risking death for a friendship.
Cliques occurr predominately during adolescent stages of life and tend to fade away once young men and women find what they actually value in life. Even then as adults, people get sucked into cliques to feel included and a part of something that makes them feel less alone in this giant place we call the universe.
