You can consider what value you derive from informing the community of what you know to be true for you, or at least the value of informing the portion of the community that disagrees with what you know.
I am not informing anyone, just having a discussion about an idea someone put forward. Generally, when I discuss an idea, I usually seek to improve on the idea, or eliminate any weaknesses within. You can probably gather from this I am an ideas connoisseur.