I only really argue about things I feel deeply about.
Otherwise I don't see the point. It's not about wanting to prove I am right. It is usually about preserving something I value (such as free speech or concern for the welfare of people, living things, etc.)
It takes a lot of energy because I am not someone who goes around wanting to argue with people--usually I'm trying to find common ground to agree.
But it's also natural because it's an extension of Fi and developing and refining convictions.
When it comes to individuals I disagree with in personal situations, I tend to listen and understand in personal situations, because I'm trying to facilitate their own growth and wellbeing and I'm not really concerned about pushing my beliefs onto individuals for the sake of it.
If it was someone who was going to do something heinous, I would put more effort into compelling their actions against it. But generally, when people talk, I tend to listen and allow them to explore their beliefs and the origins of them.
But when it comes to public speaking, I will sometimes put effort into arguments that outline my concerns. It's more formal.
That being said, I'm hardly a public speaker nor any kind of debater. I have never invested that much energy into it, as a lawyer or a politician or an entertainer. And I don't expect that of myself, because I don't consider myself any of those things aside from an individual with concerns.