Dom didn’t nail it though. You have to go to the supermarket to buy a frozen pizza and then you have to take it home and cook it. The same applies at Murphy’s. The biggest difference is that you have to wait 60 seconds for them to build your pizza in front of you. It’s like they’re almost the same, but one actually tastes good.
No one goes to the supermarket when they want pizza, they go to an actual pizza place. Frozen pizza is a convenience because presumably you’ve already bought it when you were doing your grocery shopping, in which case if you want pizza you don’t have to leave your house at all.
The other advantage of frozen pizza is that it is much cheaper. I’m guessing Papa Murphy’s doesn’t sell at frozen pizza prices but I’m willing to be wrong.