Ads are unnecessary, and you agree, one of the many ways that those with money abuse their power. Because there are other ways of abusing people is not a reason to allow this way.
The best form of advertising has always been word of mouth. Even marketers admit this, so why not rely on that? Why so much advertising?
The answer is because they can subvert word of mouth, control what we see, what we hear about, based not on reliable testimony and recommendations from people we know, but on how much money they have to spend.
At the same time they can manipulate the message to falsify the impressions we get about the project etc. The purpose of advertising is to subvert reliable, trustworthy sources, and control the content and distribution of information about conventional offerings for the benefit of business.
The idea that advertising is a service to consumers doesn’t make any sense to me.
I certainly have no need for advertising and avoid it in all forms as much as practicable. With the internet (especially a SAFE internet) at my fingertips, my social networks, this forum (!), resources like Wikipedia, content producers and authors who I select, sources all chosen by me, I have no problem discovering and learning about products and services that interest me. Adverts only interfere with that process, steal my attention against my wishes, and do not help me at all.
Perhaps you value them, but I don’t, and I think they are harmful to the autonomy and well-being of individuals and society. I believe social discovery is more efficient and reliable, add well as healthier.