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.
I think the latter part of that is a huge jump. How is seeing a billboard for a plumber promoting bad behavior?
A better question would be how is seeing ads for sports betting in between periods of a game promoting bad behavior.
And the answer to that is very obvious -- the legalization of online sports betting and the nonstop barrage of ads for it on tv and social media is bad for individuals and society as a whole.