You're talking about advertising pushing useless shit on people they wouldn't want? But they don't see the advertising until they've already searched for the item!
That's either some magical advertising that makes people search for things before they've seen it. Or you're wrong.
Or, you know, the intent and nature of most advertising is completely orthogonal to the circumstances and conditions of them appearing, the point stands, and you're not even nearing actually addressing it, just bumping over your own straw man.
And when I google for "an item", like "medium sized dog", for whatever reason that means I already...well, what? Want a dog? Maybe, likely not. Want whatever that particular ad is trying to peddle me with whatever shoddy means and rhetoric, because it might have to do with dogs, or merely claim it does? Nope.
That's either some magical advertising that makes people search for things before they've seen it. Or you're wrong.