If ads were merely about being informative, they would be boring. But ads want to manipulate, so they have to be flashy and appeal to your emotions.
They pollute your mental headspace, and have no place in a healthy society.
Let's ban billboards. And then let's follow that up with a general purpose ban on paid advertisement.
Advertising is how small and new companies can reach customers. It's how monopolies are broken. It's how progress reaches the masses.
Yes, it is willfully intended to change people's behavior. So are many of our posts on HN. That is an important purpose for communication!
Do you mean real progress like washing machines and more efficient solar panels or fake progress like another beverage company to replace the ones that are already there? Real progress will spread by word of mouth. It will be much slower, but I'll accept that to never see an ad for another McDonalds new burger of the month.
Also, search engines are the perfect solution for discoverability here. I don't care if lawn care ads pop up if I search "lawn care service" but I don't want to have this thrown at me when I watch a YouTube video about Napoleon