There are two reasons to conduct arguments in forums, or their long history of ancestors back to Newsgroups, CompuServe, bulletin boards, and newsletters.
First is to learn how to defeat BAD arguments made by amateurs. Primarily because the mass of political voters in this world are amateurs.
Second to understand the psychology of those who engage in sentimental rather than informed arguments.
What you learn is that many men cannot argue from a position of weakness by simply asking questions. And that many young men in particular who feel outcast, hold to rationalist status seeking life rafts like rats in a sinking ship.
So what you eventually come to understand, is that (a) it’s a combative way of learning for some who do not have access to quality teachers, professors, or the ability to digest written material. And (b) a combative way of getting attention on the other, from those who feel alienated. And lastly (c) a way to develop skill debating amateurs.
I have a great deal of respect for the latter use, and used it myself. It is a great way to learn to conduct verbal sparring, and to learn all the logical fallacies that amateurs depend upon.
I like to help individuals who need access to someone informed due to their inability to make a connection during their education. I see this as something between a moral obligation and a public service. Men are not treated well by our feminized education system.
But I don’t like to waste my time on the borderline schizotypal personalities or those who merely want attention.