You are right. I was wrong, or at least far too sloppy. I agree that we should not presume that any given mismatch between our rational evaluation and a more 'folksy' one can be attributed to a problem in our map. Rationality is interesting precisely because it does better than my intuition in situations that my ancestors didn't often encounter.

But the point I'm trying and so far failing to get at is that for the purposes of instrumental rationality, we are equipped with some interesting information-processing gear. Certainly, letting it run amok won't benefit me, but rationally exploiting my intuitions where appropriate is kind-of a cool mind-hack. Will_Newsome's post, as I understood it, does a good job of making this point. He says "Moral philosophy was designed for humans, not for rational agents." and that we should exploit that where appropriate.

The post resonated with my view how I try to do science, for example. I adopt a very naive form of scientific realism when I'm learning new scientific theories. I take the observations and proposed explanatory models to be objective truths, picturing them in my mind's eye. There's something about that which is just psychologically easier. The skepticism and clearer epistemological thinking can be switched on later, once I've got my head wrapped around the idea.

Hm, you know what? I think I might've gotten that Novalis quote just from browsing Wikiquotes. Although it certainly does seem like something I would've picked up from the quote threads.