Yes it's there so we can sort our activities here and make sure we don't miss something that's been published by people we appreciate. Much like I do everyday with what you post.
Sometimes comments are intended to be included as part of the general discussion and not necessarily pointed toward anyone in particular. You're dwelling too much on a part of a comment that really isn't the main idea.
Language can be ambiguous sometimes. That's why it is better to exactly precise to whom we address our point across. Better not to use "you" while having a dialogue with someone when we actually talk about someone else or people in general.