What you think is largely wrong, then. Pizza Hut, Domino's and Papa John's all do that. They may have things like their thin crusts which actually develop the glutens a little more, but they're only exceptions because they have to be. Domino's does a little more working of the dough than others, but that's only because they have a policy about fitting the dough into the pan by hand rather than by rolling. Papa John's or Round Table have a few specialty crusts which are handled a little differently, but they're still not really the main lines of sale. Pizza Hut also briefly offered something that had a partially yeast-risen crust, but it was short-lived for various reasons (among which was that it was harder to maintain the consistency demanded by being a chain).