True, but you may not want to return and receive service from a waiter whom gets combative over how little you tip. As another person who has worked both front and back of house, I’ve seen and heard some pretty awful stuff.

This is particularly why I hate the new custom of tipping before even receiving service or food. You have to do some game theoretic dance to decide whether you’ll get bad service if you tip low up front vs get bad service anyways because they’ve already got your money.