The point was that nobody really needs advertising to learn about available products. Google search stays just as useful if you block the ads, the other way around nobody would use it.
Paying for an ad on a result in a google search for legos is manufacturing demand for a product?
I think any serious discussion has to be about the ad medium.
I had email thanks to netzero way back in the day because it was ad driven, I think it's perfectly fine for an adult to consent to ads in exchange for services. I couldn't afford AOL, so without that service I have no idea how I would have gotten into email. I couldn't afford 10 cents a minute long distance calls and my physycial mail never got to my grandparents overseas.
Billboards on the other hand... those are intrusive... buildings with their company logos by the highway, maybe those are too.
I see advertising radically different.
People exhibit an spectrum of interest in products in the market, from “zero interest in buying” to “shut up and take my money”. Advertising works by convincing people close to the “shut up and take my money” part of the spectrum to actually buy.
Disclaimer: I’m not a marketeer.