Crowding is the whole point of cities: get lots of people and jobs together in a small space and let them benefit from each other. If lack of crowding is more important to someone than economic opportunity, they can go live in the countryside.

The benefits of centralization & economic opportunity for you but no one else isn't a stable equilibrium or a coherent policy goal. The only way you could plausibly achieve that over the long term is with border controls and immigration policy, something that's explicitly off the table for the interior of the United States per the Constitution.