Certain people are very smart and understand why many of the things normal people do are silly in some ways. For instance, judging people based on their fashion sense rather than actual behavior is noisy, or believing that you can do anything you want to do is inaccurate.

But these silly behaviors exist for a reason. Such people, to be successful in life, need to be reminded that just because something is silly from a certain analytical perspective doesn't mean you shouldn't do it, or some variation on it.

Many lesswrong posts fit into this template. They seem useful, and I enjoy them. Such points made in rationalist language cannot be found in many other places.