The reality is that psychologically manipulating people into buying things by forcing yourself as a middleman into every business transaction and industry on the planet is not just morally despicable, but opportunistic, exploitative, and many other negative descriptors I can't quite put into words.
But this isn't even the truly insidious and harmful part. That is reserved for the fact that the same systems used to get people to consume, are also used to manipulate them into thinking and acting in ways that someone, somewhere, could potentially benefit from. So anyone with a negligible amount of resources and effort has the ability to influence individuals, groups of people, societies, and entire countries, to buy into their agenda by pushing their propaganda. After all, modern advertising uses the same propaganda tactics pioneered by the likes of E. Bernays a century ago.
It should be clear to any sane adult that this psychological manipulation is directly responsible for the corruption of democratic processes and sociopolitical instability we've seen around the world for the past decade+.
And then, if all this wasn't enough, these advertising leeches are doing this by violating digital rights, abusing our privacy, corrupting every entertainment experience, and utilizing every nasty trick they can legally get away with to steal our data, and get rich from it via dark data broker markets in perpetuity.
So, please, spare me the bullshit excuse that this is "just" advertising, and that it's a public good that helps poor small businesses reach customers. Catalogs and contextual advertising have existed for decades, but that wasn't enough for these greedy bastards. Humanity is objectively far worse off because of this, and the adtech industry has played a huge role in making it happen. Everyone who has worked on this tech should be ashamed of themselves, even though I'm sure they don't think twice about it, and enjoy the sight of their bank account statements.