[jayd16]

The market has shown people are willing to make the commute. Not only would you need to induce the current commuters to move, you also need to ensure they aren't simply replaced by more commuters, which isn't necessarily a given.

[aga98mtl]

The market has shown that there is extreme demand at the center. We need to build at the center.

There is a fixed amount of people at any point in time in a metropolitan area. Building at the center will not make new people appear. It removes people from the commuting crowd.