It's not a bizarre exception, it's completely normal. If a math teacher tells their students that 2+2=5, it's not an assault on free speech to fire the teacher.
I like how you challenged me to listed an example thinking none existed, I list an example, and then you completely ignored that I did. You didn't even try to weasel out of it by saying that example doesn't qualify, just fully 100% ignored that I proved you wrong.
I didn't "weasel out" of anything, I didn't address a portion of your comment because I judged that another commenter had already said everything I would have said.