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!
I have no actual evidence of this always being the case but I would imagine given the fact the nature of a disrupter is that they're usually operating on principles of delivering a better product but without the budget to go crazy with advertising, they have to find more grassroots methods of market penetration.