I think the risk here is that adblocking can only grow (and maybe Manifest v3 is the only answer Google has had to that so far). As people become more frustrated with Google they either complain to their friends/family or search online for help and inevitably learn about adblocking.
Once they do that they become lost to Google forever.
Perhaps the only holdout is mobile. But otherwise ad-tech is poisoning the well for themselves.
Speaking of Manifest v3, I really hope all these adblock extensions secretly work together and on the day Manifest v3 is released, they all display a gigantic red-backgrounded warning on startup telling the user Google Chrome has turned evil and suggesting them switching to Firefox or some other browser.
Once they do that they become lost to Google forever.
Perhaps the only holdout is mobile. But otherwise ad-tech is poisoning the well for themselves.