The ‘pizza’ at my HS was absolute garbage. Pizza Friday was popular, but I never ate it. It was a doughy concoction with something approximating tomato paste smeared over it. I can’t even guess what they were using for ‘cheese’. I do know that there was darned little of it.
OTOH, there were a lot of other things on the menu that were deemed less edible, so in a way it makes sense.
When I was in college, I would go home for the summer and work as a camp counselor. Most of the children brought their lunches. A few would order from a menu of frozen foods that we would microwave. One of those items looked and smelled like the pizzas we had at school. They were not very appetizing looking when microwaved! And I am not sure if the mozzarella was really cheese. Lol Those pizzas were the most popular item on the menu. The other options were microwaved hamburgers or cheeseburgers, corn dogs, and something else. They were all nasty. Ugh.
As the old saying goes “If you are hungry enough you will eat anything”. People have eaten dirt out of desperation and drank sea water on when on a life raft. Neither helped.