It's not a metaphor. They are literally the customer.
replyThey're a customer in the same way that a martial arts student is a customer: getting your butt kicked is literally what you're paying for.
replySure. And just like with a martial arts student, if you kick their butt too hard, you will lose the customer and might get sued.
replySued for giving out hard work assignments? That doesn't sound plausible. Under what theory would a student have a case?
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