(Replay) Minimizing distortions, Worth it to disagree?

In tonight's replay of episode 190, Dr. Lisle discusses the following questions: 1. I was wondering how Dr Lisle reconciled two seemingly opposing thoughts I've heard on separate episodes. 1. CBT is an effective therapy to mitigate cognitive distortions and 2. The human brain/nervous system does an immaculate job of evaluating its effectiveness and status within a group. If our brains do such an amazing job of evaluating feedback from the group, why are cognitive distortions so common? 2.I've often felt anger when someone seems to misunderstand something, perhaps honestly and perhaps disingenuously in something that is approaching an argument. The feeling often keeps me from explaining exactly what I mean because I expect that the exact points of the disagreement are disingenuous so it won't matter and I will only regret justifying myself and "opening up". You've often mentioned that that communication in relationships isn't faulty the way most psychologist say, but you've also talked about getting crystal clear. So should I beat my genes and get crystal clear, or is the inference that it won't change a thing correct?