Why do so many Americans hate dandelions on their lawn? Are they dead inside?

Many people with dandelions on the lawn will pull them or mow them at first opportunity.
Many cities (midsize to large suburban, usually) don’t allow dandelions on the lawn either, and send Code Enforcement to have them removed.
Yes, we all know Dandelions are considered “weeds” because that’s what Dad said when we were kids.
But they are beautiful flowers.
Is the antipathy towards Dandelions a result of social brainwashing?