[TMWNN]

>They're also basically killing any locals going with the cost of concessions

Local residents are absolutely not the target audience for Vegas casinos and other attractions.

Vegas casinos offers super-cheap food and drink to lure gamblers. Locals take advantage of said low prices, but that's a side effect of the main purpose which is to keep tourists near the card tables and slot machines. The Sphere does not have gambling, thus needs the food and drink to pay their own way.