I don't see why this makes any sense.

Greyhound is long-distance travel, not local/commuter travel. These uses are usually segregated in the vast majority of cities, because the needs are totally different.

And not sure what proximity to the People Mover has to do with relative locational advantages. Why do folks think that the typical Greyhound traveler wants access to the People Mover?

My guess is that the typical traveler wants easy access to the region's freeways. In that case, the Greyhound station couldn't be more well located.