"A basketball player finding the shortest path through the opposition to the net will probably epic fail if s/he does not follow his/her feelings, or tries to think. " Well, yes, I wouldn't want to rule out the efficacy of unconscious calculations; trying to use vectors to calculate how to catch a frisbee is likely to be unsucessful. Conscious rationcination is resource intensive and slow.

Where is is bad advice is when people use these processes as a substitute for rationcination; forming of abstract theories on the basis of emotional pleasantness is unlikely to render accurate beliefs. Of course, accuracy isn't everything.