This kid is the difference between idealism and reality.
In an idealist world, automation would fund UBI, which would fund a higher quality of living for everyone. Which is effectively parallel to what you're arguing here, in it's fundamental mechanics.
As you can probably see, many Western nations don't have UBI. Why? Because automation doesn't give back to the people, automation provides more wealth to a few corporations and individuals.
The same thing goes with delivery robots. It largely benefits the corporation, which can cut additional expenses by not having to pay a human. Where does that money go? It goes to line someone's coffers. If it was taxed appropriately, then that money could go back into the public, but it doesn't.
People don't want to work crappy delivery jobs. They do it out of necessity in order to buy food and pay rent, and the buying of that food and the paying of that rent also increasingly goes to smaller set of large corporations.
That's the reality.