Why are anti-monopoly laws outdated? I would rather have 10,000 moderately rich families in 10,000 towns across the US than 1 super rich guy. It is better for t

Why are anti-monopoly laws outdated? I would rather have 10,000 moderately rich families in 10,000 towns across the US than 1 super rich guy. It is better for the economy, better for politics, basically better for everything, even the super rich guy because what's he going to do with the extra money? The laws for dealerships are doing what they were designed to do. Did something change that makes monopolies good now?