This happens when someone's job is deeply tied to their identity. I find that people who have a separation between their self-identify, and what they do for wo

This happens when someone's job is deeply tied to their identity. I find that people who have a separation between their self-identify, and what they do for work are less likely to get defensive when their technical "correctness" is questioned. People who suffer from job-identity are also more likely to adopt the "You don't understand why I am right, because I am smarter than you" stance. If it feels like someone who questions your opinion is attacking you personally, take a step back, and remember that you won't convince anyone you are correct by insulting their intelligence.