If a college cafeteria has ‘Spaghetti and meatballs’ on the menu, and the spaghetti doesn’t arrive, they can make changes to a point, but if those don’t work (meatball subs, spaghetti with sauce only) then they just scrap it and only serve the other 3 items on the menu that night. If two entrees can’t be made, then there is just less food for that meal.
If that happened at home, or a grocery store didn’t get the shipment, you’d just plan something else for dinner, no big deal. School cafeterias can’t substitute that quickly. I’m sure their orders don’t say “Hey, if you can’t bring the meatballs, just forget the spaghetti and bring us stuff for tacos, enough to feed 2000.” No.
More important is that all those college kids in California are not going to get bacon starting in January. It will be too expensive.