I'm inclined to believe that rationality is more an instrument rather than a goal, as you try to describe it. Being attached to material trinkets, (or not) will be a rational choice for the one who developed his rationality and was able to think his choice through, while irrationally dismissing the utility of mundane gadgetry as well as wholeheartedly embracing it, most likely as a result of an induced bias, exposes the undertaker to unconsidered, not-yet-evaluated risks - hence the label "irrationally".
There is some seed of truth in what you're saying - the balance between the effort of developing a rational art and the likely impact of that development on one's goal has to receive the necessary attention.
To go with the example provided (the body-builder [the rationalist jedi]) - going straight towards his final goal (obtaining an Adonis physique [being a rational jedi]) will help him develop more muscle mass [more powerful rational skills] which would mean more fat-burning cells in his body [more chances to make the right decisions when various day-to-day challenges arise] to deal with the extra 200 pounds [whatever skewed perception or behavioural pattern one has], which, in my opinion is more close to optimal than a simple diet [blunt choice of "what is right" based on commonly-accepted opinion].
I think of rationality in instrumental terms too. The point is achieving your ends most reliably and most efficiently, and rationality broadly construed is the way to accomplish those ends.
I gave the example of being overly attached to material trinkets, not just being attached. Being overly attached by definition could never be a rational choice.
With regard to the bodybuilder analogy, I think the optimal solution will include some study of diet and nutrition and modification of your diet (it's likely to be extremely unhealthy if you're morbidly obese). Wo...
What do you believe that most people on this site don't?
I'm especially looking for things that you wouldn't even mention if someone wasn't explicitly asking for them. Stuff you're not even comfortable writing under your own name. Making a one-shot account here is very easy, go ahead and do that if you don't want to tarnish your image.
I think a big problem with a "community" dedicated to being less wrong is that it will make people more concerned about APPEARING less wrong. The biggest part of my intellectual journey so far has been the acquisition of new and startling knowledge, and that knowledge doesn't seem likely to turn up here in the conditions that currently exist.
So please, tell me the crazy things you're otherwise afraid to say. I want to know them, because they might be true.