Considering the arguments above, it seems to me that they offer an explanation of why certain segments of society—most often the pious and faithful—have traditionally disapproved of skeptics: skeptical ideas and doubt can threaten their beliefs.
In fact, throughout history, neither the state nor religious people have been sympathetic to skeptics, because they cast doubt on society's beliefs. Especially in America, where the state and Christianity hold many of the same convictions, skepticism is often not welcome—sometimes along with its cohorts, discernment and critical thinking. At least we have not yet come to the point where we methodically jail skeptics, as they do in Turkey and China.
I believe there is another kind of person who also thinks skeptically, as well as discerningly; they are called prophets. Throughout history prophets have doubted and questioned the beliefs and behavior of mainstream society. When they've spoken up about their views and challenged orthodoxy, they've often become even less popular than skeptics.
Furthermore, I also think that a historian can benefit from a good dose of skepticism. My favorite historian for several years now is Yuval Noah Harari, who teaches history at Hebrew University in Israel and has written two profound books: Sapiens and Homo Deus. (In fact, I discovered Harari in a MOOC he taught several years ago.) Harari examines history through the eyes of a skeptic. He's both discerning and a very clear thinker. Years of lengthy meditation retreats have sharpened his mind. His particular strength is to examine history, connect the dots, and then interpret current events with that knowledge. That's the nature of his first book (Sapiens) listed above. He then goes on in the second book (Homo Deus) to connect the dots of today's events and then project what the future will be like.
So, I believe skepticism and a dose of doubt offers me some valuable thoughts on how to perceive the world around me. Healthy doubt can be useful—especially when coupled with careful examination of that world, and furthered by a good dose of curiosity. I can become a skeptic, without having to become a card-carrying atheist, or without denying the possibility of possessing any kind of knowledge; because skepticism is not necessarily about distrust or being a heretic. It's just as much about curious inquiry and discernment. So let those kids in school be taught critical thinking. Maybe they'll even grow up to become moderate skeptics