How I understand the article, is that they understand why others act in certain ways, they know the mechanism of empathy, but nothing here confirms that they are empathetic themselves. I think this article's conclusion is misleading.
There are many different definitions of what empathy means or how it “feels”. Do you (literally) feel the pain you’re inflicting on somebody else, do you know about it cognitively but not feel it, and how does any of it influence your actions.
That's interesting! But confusing as well. The test they reference (https://en.wikipedia.org/wiki/Psychopathy_Checklist) includes lack of empathy. Are they saying that this criterion could be dropped from the test with no effect on the classification?
https://www.psychologytoday.com/us/blog/fulfillment-at-any-a...
But maybe it is like so often more about the contradictory definitions of “empathy”, and capability vs. willingness.