You aren't missing anything....at least anything healthy to eat.
Most of the big chains use dough that comes in frozen disks. At Pizza Hut, it is placed in pans that are sprayed with either oil or non stick spray and then placed in the walk in for so many hours till it is thawed. After it is thawed, it looks more like dough should look like. Being that it is frozen, this is the reason why the store is often sold out of a certain crust style when you call. It takes time to thaw. It stopped being made from a mix years ago. You will not find a big floor mixer any longer in any PH.
It is then sauced and cheesed hours ahead of when it is sold for an order. This is how they can make so many during dinner rushes. Most of the veggies and toppings are from a can or sealed bag just like the lettuce you eat in most restaurants today. Even the mushrooms come pre-sliced in cardboard boxes.
Papa Johns gets dough trucked in from their "factory". I don't think there is a pizza chain around anywhere that makes it's own dough in store now.
Pasta at PH is also all prepackaged garb. The pasta is frozen and ran under water for a few minutes to thaw. The sauce is also prepackaged and simply mixed with water and poured over the pasta and baked.
Enjoy that pizza!