Unreasonably idealistic solutions are some of the worst kind of solutions because they make you feel like you have the answer but the benefits never materialize. The moment you pick any other OS to be the "80% of the world" one, reality will quickly deflate any sense of superiority.
And whether you can see it or not, they're all still some form of dumpster fire, be it security, usability, price.
And whether you can see it or not, they're all still some form of dumpster fire, be it security, usability, price.