Reading something already confirms your existing worldview, highlights every piece of information in precisely the right format to re-confirm your existing identity, and takes no effort or discomfort, no revision for any mental model. You finish whatever book, whatever blog post, feeling a good deal smarter than you were when you started (because look! There was content, and now it has been consumed!) but nothing has actually happened.
You’re the same person.
You had no reason to change.
Challenging yourself is incredibly uncomfortable – nobody expects training for and running a marathon to leave you feeling as refreshed and relaxed as a hot bath with a glass of Prosecco. Challenging yourself mentally is no different. You have to hold competing thoughts in your head and let them duke and duel it out, and moderate them for all your life’s worth. Most folks aren’t willing to do that.
Which makes the market for comforting, conforming ideas far more lucrative than the market for ideas with a fighting spirit.
The Intellectual Circle Jerk and Why We Can’t Stop