Nailed it.
I'll go a step further and say why argue with anyone? Usually when you engage in an argument, both sides are entering it unwilling to relinquish their perspective/opinion. (Of course assuming these arguments are heated or those involved are listening to reply rather than listening to understand and refute)
There are people who are actually capable stimulating you intellectually and test your critical thinking without provoking a negative emotional response, and vice-versa. I would consider these more as playful debates than arguments.
There's a difference between a argument and a disagreement.
At the end of the day, arguing is always a choice. You either provoke someone or you allow yourself to be provoked. I've been in a relationship for over 2 years and have never argued with my girlfriend once and never will, simply because I choose not to.