This is just a case of "I matter, and you don't, because I'm a nurse, and you're a Dominos employee"
Someone said earlier that nurses don't have the time to sit down because they're too busy. Welcome to every job ever. I've had such sour experiences with nurses over the years. You didn't have to go to Harvard to do what you do. You can't be a doctor or you couldn't afford a real school, but you wanted more. That's fine. I understand that. But if what you chose to do makes you bitter and entitled, because it's a handful of a job, then you're not going to be as acknowledged and loved as you'd like to be. It's like a firefighter demanding respect because he's brave. Yeah, you WANT to do that. You chose to do that. If we drafted firefighters, nurses, cops, I'd respect them a lot more. But they always end up being boys clubs/girls clubs that feel sorry for themselves because the rest of the world, which also has shit to deal with, like a Dominos employee getting a late order when he or she just wants to go home to their family, the rest of us are sick of dealing with that.
That nurse thinks it's wrong for this guy to call him or her out on the receipt. So, the nurse makes it viral so that the pizza guy looses his job. "I don't like what you said to me, I'm going to call your manager and I'll have your job" Get a grip, move on. If nurses are so tough, you'd just move on. End rant.