Yeah. If you want to do things differently, you have to see things differently, and/or you have to want different things. And different emotional states achieve that. Or drugs. Or travel. Or anything, really, apart from "the same thing that happened yesterday". (Which is most people's default.)

The titles aren't, but the actual articles are, as the other one said that being happy makes you creative, while being sad makes you less creative but more focused.

On the other hand, this article seems to agree with the focused part, so I think the difference is probably how they defined creativity, as in this one they asked artists to do it while in the other article I believe they looked at brain patterns.

There's one recommending boredom now too.