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A vast majority of people become frustrated when faced with unrealistic answers and are, therefore, probably less willing to engage with people that seem to believe the world is "perfect" compared to those using real-life examples.
Barking orders and commands at people will usually get no-one anywhere and is, in actual fact, more likely to result in a fight over "who's right" instead of trying to work as a team and solve the relevant issues.
Some educators have been known to set unreasonable expectations for their students. And, in most cases, this doesn't end well and will usually cause students to behave even worse with other people.