My point is that that is exceedingly rare - it is a statistics game. For the commenters too. You read and write all your life. You don't spend 100% on every com

My point is that that is exceedingly rare - it is a statistics game. For the commenters too. You read and write all your life. You don't spend 100% on every comment, even the most committed commenter soon settles into an equilibrium of effort vs. perceived/expected rewards (how many people are you likely to reach that would truly benefit). For example, you see somebody posting what you know is a big misconception. You spend time and effort educating and clearing it up. Even if you succeed, you soon run out of patience - you reached a hundred people, 5 of whom cared and will remember. However, there are a few hundred million left in the world who still have that misconception, and there still are way more daily conversations and blog posts where the misconception is spread. You on the other hand spent half an hour education a handful of people. How long until you ignore comments you know are wrong and just shrug and go on with your life? Answering a specific one-time question by pointing to some resource or project is easy enough in comparison. I did not mean to imply that all comments are always useless. I did not think it would be necessary to point that out. See, that's another problem, somebody always comes up with an interpretation of what you write that will make you spend even more time to clarify because you never thought that interpretation would happen.