There certainly are people, a rarefied minority, who, through experience or their own evolutionary history, are aware that their immediate reactions are not to be trusted and often even seek out contrary information to aid in evaluating those reactions.
I think this can be affected by education and practice. (Maybe you were including those in "experience.")
In my case, I had a high school economics class (it was elective) and the teacher spent some time on how advertising is used to manipulate people. I'd say that is one of the most useful lessons I got out of any of my education. But, I didn't really apply it right away. I'm not sure when the "a-ha!" moment came, but at some point I "got it" about advertising for consumer products. It didn't take trying to make a rational decision in very many idiotic political campaigns for me to realize that the same thing was going on.
I guess in my eternal optimism, I'd like to think that people could be taught about this like I was in high school. Maybe we really need to get to the kids - maybe it's too late for most adults. But I sure hope not. At any rate, there are adults who are "lifelong learners" and that group should be teachable. I really do think it would be a worthwhile effort. But frankly, I think it is undermined by the current ridiculous "perpetual campaign", that probably turns off a lot of thinking people to the political process altogether.