I don't think it's clickbait... when I think of clickbait I typically think of something that is either (1) exaggerated or misleading in order to induce a click (e.g. "Tucson dying of thirst!"), or (2) uses tricky, withholding language to induce a click (e.g. "Tucson drew water from Colorado River, you won't BELIEVE what happened next!").
In this case, it's an accurate description of the phenomenon discussed directly in the article.
In this case, it's an accurate description of the phenomenon discussed directly in the article.