Everyone has a right to their own opinion. When you think about it, where was that proverb generated?
In the words of the great sage Emo Phillips, “I used to think that the brain was the most wonderful organ in my body. Then I realized who was telling me this.”
In my darker moments, I think that every human political tendency is just an instance of this very problem. Terry Pratchett (our most underrated explicator and critic of both Traditional Rationality and Bourgeois Morality) described it most pithily as “Wouldn’t It Be Nice, If Everyone Was Nice”. It’s most obvious on the left, but can be seen on the right and libertarian tendencies as well.