It works just fine, thanks for asking.
Well, the simplest is that it's "Wisdom-based" damage, which dovetails nicely w some classes that have special abilities/DC's that are Wisdom-based.
Beyond that, HW takes advantage of "helpless" targets, which by default take +50% extra damage. Many classes/trees allow extra damage "vs. helpless" - HW capitalizes on that.
o
https://ddowiki.com/page/Helpless
And, yes, it def is not just mashing buttons in-series.
It requires that you learn what your attacks do (
), understand how one attack sets up others, so you can make the most of what they give you.