We have seen your scenario, and we have also had, in the last three years, a taste of brigandish's scenario, so I feel people can make up their own minds about

We have seen your scenario, and we have also had, in the last three years, a taste of brigandish's scenario, so I feel people can make up their own minds about whether they are usefully comparable. And if you do think they are comparable, note that the equivalent of a "build-your-own vaccine kit" in your scenario has not materially improved the situation (right now, "Google Has Most of My Email Because It Has All of Yours" is at position 8 on the HN front page.)