I remember it being explained somewhere (can't remember where) that the Death Star(s) were built by Wookie slaves and not contractors or construction workers. Most of them would have preferred death over their forced labor. So while yes, it is tragic they had to die, most probably would have been thankful for being released from their tortured existences.
In a way, isn't this a part of the Chewbacca/Han Solo story? Didn't Han save/rescue Chewbacca from slave labor, which is why Chewbacca owes him a life debt? It's been a while since I've read the books, though.
However, I did enjoy that conversation and it is interesting to think about. Clerks is a classic, of that there is not doubt. But according to the "official" story, it's simply incorrect.
The beauty of a LEGO MOC is not the elements that go into it, but the way those elements are put together.