[lcnPylGDnU4H9OF]

I don't think they argued their point well, but I do see it. The argument is that Twitter is an important website at least to the point of not dismissing the troubles of Twitter's users with "I am not missing anything". It hardly matters if a particular person is not missing anything; many other people (who are actually on Twitter) are also not missing anything but they also happen to be invested in Twitter as a social media platform.

Someone who doesn't visit this website could say, "People seem to care too much about HN. I don't use HN and am under the impression I'm not missing anything." They wouldn't even be wrong. But it's also dismissive of everyone who does use this site and ultimately irrelevant to any issues which the HN community might have with the service.