While I partially agree, some of these people will also actively ignore information when presented and do not have a skeptical mind. Many people do not change their mind after they first form an opinion on a subject or it takes a lot of effort to change it afterwords. Forming opinions quickly and never revisiting the underlying assumptions, I would argue can be dangerous as well and is probably more normal that either of us care to acknowledge.

Some people are in very high positions of power and can make decisions that impact peoples lives. Ignoring them and letting them do whatever they want may not always lead to good outcomes. But I will agree that purely ruminating on it does not improve one's situation.