No we don't. I need a better mouse trap, but I already have mouse traps that work, so if you make a better one you need me to find out about it otherwise I'll just buy the same old not so good ones out of habit thinking they work as good as any other one. There are also problems that I don't even know I have. There are a lot of houses with terrible insulation that the owners really need some advertisement to get them to upgrade - it will pay off in just a few years.
Even now I will go out of my way to watch adverts for things like films I might be interested in.
Need to be careful with word of mouth though, many adverts are spread by word of mouth, especially on the internet where people are paid to say "hey this new $product is great". Those are worse that clearly marked ads.