You are writing the teaser headline for an online article. A piece, an article, a column, a blog. An informative body of writing, be it factual or opinion.
This article, by definition, contains the “here’s why.”It IS the here’s why. It is imbecilic to add those words to the headline, as if there are headlines that don’t point to an article at all. Cut it out!
Hahahaha! All of you! Brilliant. This is why I love it here.
And incidentally, I think it’s time to also move on from “the real reason.” By now, we all know that the real reason is because of that one weird trick.