Apart from the line "does it help in some ways, sure" the overall message of their post is that the author is wrong and that you can be equally successful without being sociable, which is a general statement.

It's not really supported by the anecdata that OP is a skilled, unsociable, successful person. That only tells us that this person, in their particular line of work, with their particular set of skills, can be successful. It also doesn't consider whether a version of them that was more sociable would be more successful.