WTH all due respect - could you be any more elitist? AFAIK, Disney doesn't require a means test in order to buy tickets and enter the parks. There is no mandate requiring guests to purchase food on site. In fact their FAQs state that food CAN be brought into the parks. There are many reasons why people do it. Babies need baby food. Toddlers want their favorite snacks. Some people are on special diets. Some people are local, and just want a quick bagged lunch from home. And yes, some people can only afford the trip if they bring their own food. So they DONT run up CC debt ( let's puncture that balloon right now). If that s how they want to budget their trip, that is their business.
I'm all for people bringing their own food if that is their choice/need. I just dont want them to hog restaurant tables needed by paying customers. Disney does provide other seating areas (usually outside). The resort food courts are,IMO, an exception. They are an amenity provided for the use of all of their resort guests.