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.
This sprint to the extreme is how one ensures we cannot ban billboards. (If I worked for a billboard company, I would try to frame a billboard ban as a ban on ads.)