I generally agree with your statement above, but yes, there are a lot of otherwise smart people who immediately and blindly follow a narrative based on a headline, a tweet, a misleading infographic, etc. It’s due to one or more of the following reasons: laziness (they don’t want to spend time engaging in critical thought, research, comparing multiple sources, etc.), emotional connection (or aversion) to one side of an argument (and unwilling to let facts sway them), they live in a bubble that is better than what 99% of the world experiences and think they have ultimate SA when they actually have nil (I liken this to the Army’s self-image of their SA on how to use airpower), and they see modifying their viewpoints as losing/quitting/giving up, so they won’t do it (regardless of new information presented).
I see the above every day, across the political spectrum, from college-educated, “smart” people. They’re good people, but they blindly follow a narrative and refuse to have an open mind to new information, or information that doesn’t support their opinion. They then are unwilling to accept that people may disagree with them, and are disrespectful, disdainful, condescending and/or aggressive towards them (vs. having an unemotional, respectful conversation). Much of America is driven by emotion (fueled by social media and the MSM). So yeah, a lot of otherwise smart people very much make their opinions while sucked deep into the FaceBook void, and I think that essentially is a vacuum of single POV information with more misleading and flat out false information than their is truth.
Instructional Fix: Stop getting your information from social media, throw your emotions in jail for a second when you have a complex conversation, and be open to other ideas and welcome information that doesn’t support your bias. Even if you don’t trust it, acknowledge it and do some research yourself to verify it (from reputable sources), then don’t be ashamed to update your viewpoint if said info is found to be credible/accurate. Lastly, have respect for others and in the end, this is not a competition...be OK with someone else not changing their mind and accept that you can disagree while still being friends, neighbors, etc.