There is a very, very clear and specific problem: "free" advertising supported sites incentivizes farming user engagement. Farming user engagement needs be sharply curtailed because it's proven to be broadly damaging to society and the direct way to do that is to reduce the incentive, advertising revenue. It's as straightforward as that.
Oddly enough, this comes from Google having a monopoly on web advertising. If you're an advertiser, let's say for the sake of argument you're a company with $80 billion in revenue, and you find your ads placed next to a ragebait post, you might complain to Google, and they will promptly send you a canned response and send your email to Gemini for use in training data. If human eyes ever chance to see your email, it's a good chance that people in that department aren't working hard enough and they should do a layoff.