While that may be true for most people, I think that knowing everything about horse rules & conventions would give a car designer an upper hand _if_ that car designer was also the type of person to easily let go of his own presuppositions about things. What I'm trying to say is that there are people who are not held back by knowing what the rules of the game are, because they are not afraid to throw them away, even if learning those rules took a great mental investment.