If having a job as a pizza delivery man means you're uneducated and they should all go to college, then who the hell would be picking up or maybe even making her pizza?

Then no one would be getting her her extra large pizza with a large coke.

A) How does she know you're not in college? B) Whether or not you are, you have a job at least so what's her problem? And C) If she frowns upon delivery people because she thinks it's a failure of a job or whatever then why is she ordering pizza and who does she expect will deliver it?

No, no. That's how you PAY for college

Should've come back and told her child that whether she goes to college or not, people will still shit talk you behind your back

That's where you say don't go to college unless you want to work at Pizza Hut to pay off the school loans.

Tell her that if everybody took her advice and went to college to pursue something better, there wouldn't be anybody to deliver food to her. And also tell her that college students work jobs like that for monetary support during school.

Its good you have a job but she's right.