Billboards ARE banned in some states, e.g., Vermont.

It is immediately noticeably nicer to drive there vs neighboring states.

It also generates a few fun stories, such as the grandfathered-still-existing tall sign north of Brattleboro that said "Steak $5.99" for years after the steak house had changed. Eventually, while it was being leased to an Asian restaurant, people protested that it was false advertising (as steak had not been available for years and certainly not at that price). The landlord still wanting to keep the sign, but not allowed to change it, removed the "S", "K", and "$5.99", so the sign read "TEA" for many more years, and AFAIK, still does.

I would not miss a single one.

"...in a single year, São Paulo removed 15,000 billboards, many of which were replaced by street art."

https://www.theguardian.com/cities/2015/aug/11/can-cities-ki...

If you don't have the right to hold up a sign saying whatever you want on land that you own, it's a serious limitation on your free speech. So while I think it's reasonable to place safety and aesthetic restrictions on advertising, it's worth balancing those restrictions against free speech ideals.