It means that everything about the web, but especially the critical parts like privacy vs surveillance is increasingly and sadly dictated by Google. If you distribute their vision for the web, their literal web platform, Blink, you are harming the web by increasing Google's stranglehold.

And yes, the web would be better served by people building their own, hard forking an existing, or using any of the two or three remaining not-Google solutions. The web would be far better if Google was the only Chromium distribution because we wouldn't have the illusion of a dozen choices that are all just Google's and we'd likely have more and more viable alternatives.