Are we really afraid an untrained mind is going to taint it or be tainted by it?
Well, sometimes, yes.
For one thing, “Knowing About Biases Can Hurt People” http://lesswrong.com/lw/he/knowing_about_biases_can_hurt_people/
For another, telling people about research about what likely (subconsciously) motivates them and makes them happy changes the structure of their minds in potentially important ways. It can skew their perception of their incentives, so that things that once would have made them happy or productive will now do so less. Humans are not automatically rational, and sometimes knowledge – especially half-understood knowledge – can be more dangerous than ignorance.
