No, totally valid. I used to drive pizzas, so I always make sure to at least fork out $3 because of gas, etc. The nice thing about the job was it was very minimal on the kind of "playing nice" shit - I'd show up, give the person the pizza, get the money. Once I started working as a driver, I realized how much goes into the other tipping professions that I wasn't responsible for (i.e. small talk), so I made sure to take care of them as well. Even though pulling a beer off the draft isn't nearly as difficult as driving to someone's house, the bartender also has to keep an eye on me, make sure to offer a new draft, etc. I think that at the end of Bullshit Jobs really hits things home with the emotional labor/care work stuff. That's the real value of the waiter - a robot could easily move food 50 feet, but it couldn't tell the customer what's good or not, etc.