I began working at McDonalds when I was 15 (no one ever tipped). As soon as I got my drivers license at 16 I started delivering pizzas. I thought I had died and gone to heaven but it was deliveries mostly to college students and relatively poor people who never tipped. The experience from these jobs was invaluable later in life and I tip 20%+ now to pizza delivery drivers and in restaurants. Tipping is often reasonably influenced by ones financial capacity to tip.
I worked for a family owned pizza restaurant and have never in many years since eaten better pizzas or sandwiches than the ones I delivered.
For goodness sake even Spiderman couldn’t cut it as a pizza deliverer.