I think a main reason why I try to correct friends thought patterns is practice. With friends I get a certain amount of wiggle room, if I accidentally say something that insults them, or turns them off of rationality, or would cause a form a social friction, they would be inclined to tell me before it got between us. I can learn what I did wrong and don't have to keep bothering the same friend to the point of it actually hampering our friendship.

Lessons learned from this can be used to correct someones thought patterns when it is much more imperative for you to do so as in cases where

your ability to accomplish your goals directly depends on their rationality.

and allows you to teach these people whom having social conflict would be very difficult since they are typically people you have to cooperate with a lot.