I have heard that "cheaper to eat out" argument as well and always thought it was bogus. However, I never considered the angle of people having absolutely nothing in the kitchen and counting the cost of the entire sack of flour and bottle of olive oil as the price of the pizza. I guess if you only cook once and year and then let the oil and all the other food go rancid, then it might actually be true. I always have all of the ingredients to make a pizza in my kitchen, so if I want pizza tonight, then in a warped accounting way it costs me nothing (having spent the money already some time in the past.)
English muffin and French bread pizza are really easy to make even in college in a toaster oven. The legit dough is also really easy to make (dozens of yummy recipes online.) In fact, with the advent of the rapid rise "Pizza yeast" that the stores carry now, I can have a pizza made in less time than it takes for the delivery guy to get here.