I asked WIS about this in a user chat years ago when HD was new, and they told me work ethic DOES have an on-court effect on things such as offensive rebounding, and it seems to me that has been the case in some of my players.
For example, I had two guys on the same team. One was 69 REB and 34 WE while the other was 40 REB and 92 WE.
The guy with the higher REB did better at overall rebounding, but the guy with the higher WE got more rebounds than I expected him to get. That wasn't the big "shocker", though - no, that was when I realized the guy with the higher WE got significantly more offensive rebounds than the guy with the higher REB rating.