“When explaining I usually presume that my conclusion is correct and focus on optimizing the credibility and presentation of my arguments”
Thats because your sentences are badly formed.
As a debater (i know how much you guys hate debating and testing your theories), i have to do allot of explaining, and if i include any flaws or fallacies from critical thinking (something else you dont know about), then i know, and my opponent should know, that this is a mistake. So to illuminate them helps to create a logical explanation. And that is our goal.
Too bad no one here seems to know diddly squat about critical thinking OR debating.
Can i just point out, that psychology wont help you get to logic.