And in practice, we can be so cruel to teachers. Speaking personally, I went to middle and high schools where respect for authority wasn’t exactly at the top of the priority list. And even if the students weren’t throwing chairs at each other and/or the teacher, they likely still weren’t being decent.
When you’re a kid, talking back to your teacher could get you into detention, or an uncomfortable parent-teacher conference that might end with no dessert for, like, a month. When you’re an adult, talking back to your boss could make you homeless in a matter of weeks.