The very first sentence in the parent comment is "All aviation, altogether, private jets inclusive, is less than 3% of world emissions." So your comment is completely off base.
Notice, it's a very common occurrence. People note that something posted is inaccurate, in their own personal interpretation. It's usually not directed at them, but there's a need to correct the posted because of their personal interpretation (re: xkcd Duty Calls). This is not to say, I've never been guilty of this (maybe this post is a great example). Sometimes I want to argue. Sometimes I want to explore my own beliefs, given another person's position, and get it recorded somewhere. That being said, I can recognize that it's not constructive for the conversation at hand and I'm trying to do better, while still growing my own understanding.