That's very true. Even store bought frozen pizza isn't that bad, at least here in Europe. Most frozen pizzas I look up on my calorie tracking app are between 700 and 900 calories per whole pizza, which is an okay amount for a meal for a somewhat active male in my eyes -- if you only eat that one pizza and don't add some atrocity like mayo or ranch or even a dessert or side dish to it. They have roughly the same quite reasonable amount of fat and protein (30-50g per pizza) and usually at least some fiber. I could easily eat 3 frozen pizzas per day, stay within my calorie limit and get enough protein. What I'd be missing though would be vitamins and I wouldn't be able to reach the recommended daily amount of fiber. I wouldn't want to live off of pizza only, but I could do it if I had to for a limited amount of time. The pizzas from pizzerias, on the other hand, are more concerning IMHO. There's way more cheese on them, they are much bigger and thicker, and even the toppings somehow always make the whole thing so fatty it starts to drip. That's something I couldn't bring myself to live off of for more than 1 day in a row.