There is not enough actual competition for this to happen. Take a major hub like LAX which is already segregated by groups of airlines across subsets of termin

There is not enough actual competition for this to happen. Take a major hub like LAX which is already segregated by groups of airlines across subsets of terminals. How many options do you have to choose from post-security for something as simple as burgers or pizza? Let alone something like pasta or something like Indian or Chinese food. “We have both Panda Express and McDonalds” is not a sign of competition.