This distinction seems very fragile. I notice you've switched the act from "working on" in the original quote to "presenting". I don't think your distinction works anymore if you remove that change you made.
Why would it be wrong to regard someone dedicating most of their time to actively accomplishing ("working on") an unethical thing as an unethical person? What else could "unethical person" possibly mean?
Why would it be wrong to regard someone dedicating most of their time to actively accomplishing ("working on") an unethical thing as an unethical person? What else could "unethical person" possibly mean?