I had the same reaction. I was wondering, "Since when are Word, Excel, and Photoshop enterprise software?" I've been using these as consumer desktop software for decades.
That said, I do agree with GP that enterprise software is complex because it's designed to be adaptable to existing processes, whereas simpler software seeks to adapt the user to its prescribed process. And even without being an enterprise, I often find myself drawn to software that adapts to my needs and preferences rather than the other way around.
Just because the advent of mobile-focused product sensibility has seen a (regrettable, in my opinion) general drift toward significantly reduced feature sets in software does not mean that existing software with broad feature sets is now "enterprise."
Anecdotally, 20 years ago, scores of programs allowed the user to easily and broadly customize the colors of their user interface. That sort of flexibility was among the first features on the mobile simplification chopping block. As a result, most software created within the past few years has a single "true and good" color scheme dictated by the designer. Today we see that evolving slightly with the popularity of "dark" schemes, giving the user a choice between two, but only two, designer-crafted themes.