At our last coffee break, we talked a little bit about why some people believe in conspiracy theories. Two of the main reasons are:

• Science is “too complicated”.
• Don't trust the institution.

“by relying on ones own senses to discern the true nature of the world around us”

https://wiki.tfes.org/Flat_Earth_-_Frequently_Asked_Questions#What_evidence_do_you_have.3F