Sara Gorman and Jack Gorman explore why misinformation and outright falsehoods spread so widely and rapidly. After naming several common factors, they go on to suggests that some persons are willfully gullible:
But this can’t be the whole story, especially with claims that are especially unbelievable, like the idea that saltwater cures coronavirus. This is where we need to understand that people are not only having increased difficulty processing information but they also have a desire to believe something, anything. In order for misinformation to truly work its magic, there has to be a willingness on the part of the recipient (or victim) of misinformation to believe it.
The entire piece is worth the five minutes it will take for you to read it.