I think an important part of your statement is “interested consumers”. A consumer who is not interested should not have to be bombarded with advertisements. At this point (making someone do something they do not want to), is where it becomes manipulation.

For instance, I have no interest in receiving snail-mail ads for credit cards. I am happy with the ones that I have right now, and regularly research on my own via trusted third parties to see if any are available which would be of interest to me. Still, I am unable to stop receiving mail advertising credit cards to me. There is not even recourse I can take because states have fallen for the same “connecting producers to consumers” argument as above, in the most broad sense, where every human is a potentially interested consumer for every single product.

The business is worse off (because they pay to advertise to me, and I will not get one of their credit cards), I am worse off (because I am upset I receive this mail), the planet is worse off (deforestation), others are worse off (perhaps the time spent by postal workers delivering me junk mail could improve service to others or reduce costs).

So while I agree that advertising is not inherently manipulative, when the audience is captive and uninterested, it becomes manipulation.