Do you only blog because you're right and you can put to right the rest of the world?
I'm sure you wouldn't put it quite that way.
For what it's worth, I blog to learn. Just like I listen to others - but I don't necessarily believe everything I read - and I am open to the fact that in my stretches to learn, my detail work will have errors. Not that being error free is anything (even the Bible knows that being error free is a red herring.)
I do have something that may find a way under the thick skins, stiff necks and hard hearts of others too. You never know.