Why would you think that the author was speaking for anyone but themselves?

When I say "juggling is fun", I'm talking about my own experience. I'm not saying that everyone else should drop their hobbies and take up juggling.

Why should the author have to couch the headline of their article with this kind of defensive language that you suggest? The very first word of the article is "I", it is clear that the author is talking about their own experience.