So you think Whole Foods doesn't want to compete with Super Walmart?
If Whole Foods avoided Super Walmart then they might as well shut their doors. There's no way that's the reason.
I thought you could have 1 license per franchise per county. If they only put 1 Whole Foods in the area, they could sell beer. It's not like these stores avoid the entire state, because they definitely exist. They only avoid certain parts of the state where projected revenue is lower.
They want a specific type of population and population density. Like you pointed out, Pax river is the only area in the tri-county where it probably could make sense (even though it's the "poorest" of the 3 counties). But even then, it may not be enough population (they're ignoring the commuter population that would shop there).
I'm not convinced we have the population to support one of those chains. For every person who says they want a Wegman's, you see a few people who rush to Super Walmart for their every need and wouldn't pay premium prices for food. They probably want either a similar population that's more urban or a larger population that could still support them. I'd like to get a better option out here, but if so many locals doubt they'd succeed, what makes you think an outside observer is going to see things in a more positive light?