People are all different, so the reasons for them believing in conspiracies cover a broad range of factors. In general, though, people tend to believe in conspiracies because of helplessness.I found that belief in conspiracy theories is strongly linked to insecurity about employment, alienation, lack of interpersonal trust, and minority status ...
people who believe are just faithful. the mind creates things for several reason which you mentioned, if they believe there's conspiracy then maybe there is a grain of truth just to entertain themselves. theories are theories. much like how people believe in darwin's theory about us came from apes. they are all theories anyway.