I have three ideas here. (I present these as "one or the other or both", not as any kind of a cohesive package.) 1. Many people find the default accepted wor

I have three ideas here. (I present these as "one or the other or both", not as any kind of a cohesive package.) 1. Many people find the default accepted worldview to be empty or unsatisfying. Aliens or bigfoot give them something else, something "out there" to believe in. 2. Aliens or bigfoot give them the sense of being "in the know", one of the few who "accept the truth". It lets them feel good about themselves, that they are special. 3. Aliens and bigfoot don't ask them to change their life in any way. University scientists and government experts say some uncomfortable things sometimes.