Finally, what's wrong about thinking something is good because we like it?
I like ice cream, and I don't admonish people who buy ice cream because they like the taste, I do admonish people who think buying ice cream will help their health or improve their chances of winning a marathon (I would have used smoking since ice cream may not be that unhealthy but I don't like smoking).
In other words, nothing really. What is wrong is the human tendency to assume that things that we like also make us more capable or are the best course of action in the long run.
The long run... has to stop somewhere, if you want to make an evaluation. Otherwise, like Dr. Manhattan said, there's no such thing as "in the end". Societies face very different challenges depending on the era they are in, and what is good at one time may not be good at another. However,
I have found this most wonderful (if fairly lengthy) article, and thought you would enjoy having it brought to your attention.
It is so good, I think we should include it among the references in the "Politics is the Mind Killer" wiki page. But, before that, I submit it to you, and ask you: is there anything in this article that would warrant its exclusion from this site? I mean, besides the fact that it is about politics, and written by a notorious Social-democrat (And is that in itself grounds for exclusion?).