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!
But - also - my wife and I opened a restaurant recently. We need exposure. We are buying ad space on social media, having influencers review the place, working on putting up fliers at public bulletin boards, and investigating mailers (snail mail). It's clear, we're not going to make a go of it without connecting with more customers. If it was just me and her working it, we'd be in the green but we have day jobs and pay our (necessary) employees fairly.