Your reply is not very HN, but you have a point. Many things cannot be settled with a scientific argument because we rarely disagree about the mass of an electron or the spectrum of Helium. In our daily discussions, almost nothing can be decided by science. Most of it boils down to different values, and different ways to think about the world (Weltanschauung). Finding common ground in those cases is hard work which requires inderstanding, openness and fairness of both sides. Or the acceptance of authority.
Everything is subject to fallibility, even things that appear true by definition (if they attempt to say something about reality). Not only matters of worldview, moral values, and philosophy, but science too. It's not simply adding bricks to an edifice that is permanent and final. It's all wrong stories, of quite steadily improving similarity to reality. The goal at any point in time is to be wrong in the next way.
That's understood. Science is never the definitive answer, but I added the "authority" bit for a reason: if you don't know what the mass of an electron is or how you could go about finding out, you end up having to accept authority. But there are many things that are (currently) not open to a similar objective scientific approach. And those are our daily concerns, and the most contentious topics. The scientific method isn't going to help there.