“I’m right and they’re wrong” is a unpersuasive argument, and doesn’t provide a foundation for deciding the rules in a pluralistic democracy. What best serves “human well being” is highly disputed. How do you create a framework for groups to cooperate democratically without agreeing in advance who is right?
The problem is that you’re begging the question. You’re assuming that maximizing individual freedom is what serves well being. Most humans disagree with that premise. Studies show, for example, that Christian conservatives are both happier and have more children than other Americans. Those are “objective” measures of “human well being.” Indeed, zooming out, nearly every highly individualistic, secular western society is in decline—to the point where they can’t even take care of their elderly population without importing religious Catholics from Latin America (in the US) or Muslims (Europe). “Ability to propagate one’s culture sustainably” certainly seems like at least one measure of success at serving human well being, no? And on that measure, modern "liberal democracies" are failing.
Now of course there are other ways to measure human well being, and liberal democracies do quite well on those measures. My point is that by 2022, it should be clear that people disagree on what constitutes a good life, and societal progress. In the last two decades, we've seen country after country reject secular liberal democracy. And even in the west, reaction is on the rise. A majority of Hindus, Afghans, and Iowans agree that San Francisco isn't their dream for the future of their own society. And if you want to dismiss that as "they're wrong and we're right," what you're advocating for looks more like a holy war than "liberal democracy."