Even if you do think it’s plausible that Google can do this in a way that can’t be beaten (at every step so far they’ve lost this war, so the odds really aren’t on their side, but let’s allow it as a possibility), this just means that we need to get more people onto non-Chromium browsers (meaning Firefox and whatever else comes along) so that it becomes infeasible to run a website that only supports chromium based browsers.