Thanks for the shoutout. Boz, the author, was able to listen to feedback and become thoughtful about his behaviour. That's very lucky for him. Some people have difficulty with self-reflection. The friend provided evidence and the author was able to see the truth in it. It is difficult understanding that people might not see us the way we see ourselves. It's important to seek and listen to feedback from people we respect. It is more difficult changing. It's interesting that he says "I thought my job was to be right." Even in engineering, there are many shades of right. We don't enjoy talking to people who are full of certainty about their own rightness. There's no point. The way to invite conversation is to do this. State your position of supposed rightness. Give your reasons. Then add, "What do you think?" Listen to the answers. If you are right, you'll have a chance to get buy-in. People won't buy into your vision unless they understand it from their own points of view.