In reality it is not that they are not productive, it is that a relationship without respect is nothing, a conversation without respect is nothing.
The truth I have not read your previous post to comment or comment on him, but what is certain is that no matter our position or how much we think that the other is wrong, the important thing is to put on the shoe of the other person to try to understand why he thinks in one way or another, and in many cases we have to understand that the battle is lost to foolish people, who do not accept comments from others and resort to insults to feel winners.
In reality, the real gain is to learn from the opinions of others, to take their visualization in order to work on improving ours.
The truth is very relative, depends on a very subjective view of the world and situations ... THERE IS NO ABSOLUTE TRUTH
Everyone believes in their truth, in their world, but is surrounded by thousands of people in their worlds and the only way to progress is to coexist.