Chrome's manifest v3's entire purpose for existence is to ultimately snuff out ad blockers so they can make the internet worse for everyone and get more money in the process.
And if you don't believe me then you are wrong.
Of course they won't do it immediately. They won't entirely rug pull their browser's user base.
They'll just keep raising the bar to get approved for Chrome Store, making it harder and harder to comply with their extension requirements while also changing the way they deliver their ads.
This way the ad blockers have to be updated and then go back through the extension store review process until the developers either get tired of jumping through their hoops and gives up or until they can no longer afford to keep the extension alive.
And then they'll rug pull, just like Reddit and Twitter, and all of a sudden ad blocking extensions will require that the users pay Google for the privilege of having fewer ads while still letting some ads through anyway, and that will be that.
Best to jump ship now, things are nice and cozy over here in "user wants are respected within reason" land.