Because "force" means you're not willing to talk and argue your point. You are advocating that someone can pull a gun to other people's head and make them do what he wants, and this is unsustainable, detestable and immoral.
So you should care because I am advocating a philosophy that is cogent and supporting of a peaceful society, while what you are arguing is the opposite of that.
So you should care because I am advocating a philosophy that is cogent and supporting of a peaceful society, while what you are arguing is the opposite of that.