Juggernaut is unstoppable.
Corporations (beyond a certain threshold of market control) doing shady, consumer hostile things for profit is the norm. So I don't think the ticking time bomb concept is nonsense at all.
As a recent example, Google was an overwhelming net positive for years. They genuinely made the internet better. But the day they went public their eventual abuse of their market position, intentional or not, became inevitable. We're only in the early stages of seeing what that will look like.
Asking questions about whether we want to help give companies the market position to become abusive makes the most sense early, not after it's already happened.
I'm arguing against the logic: "every big company always ends up being a den of advertising evil". Cherry picking examples like Google is not proof of this.
Not every company is Google or Facebook. Is Apple selling its soul to advertisers tomorrow? Is Netflix going to insert ad breaks every 5 minutes any day now? Is Tesla going to have you watch an ad every time you start the car?
The fact is, a number of companies control a huge number of eyeballs. An unethical exec taking advantage of that would cause enormous PR nightmare. If you're making money with a great brand reputation, you don't mess with the recipe.