If there is no difference in whether he is told, then neither is better than the other. It cancels out into a completely neutral decision with neither being correct or incorrect.
As far as this whole not finishing the game part, he was already saying he was going to do that last year if not longer ago, I forgot the exact timeline, but all that happened was he did some other art and came back to the game after a while like one would expect of an artist with the kind of quality he produces as that tends to mean said artist gets swamped in commissions and doesn't have time to do their personal projects even if they want to. If there was a threat of him not finishing, it would have already been triggered and the game would already have been dead when he first threatened it.
I actually agree that there's no real reason to say anything to him, or interact at all because as far as I'm concerned he doesn't exist as an artist available for any outside work and my only connection is as a pirate player of the game, but as far as why some people do it, that's probably retaliation for his dickish behavior toward westerners, including genuine potential buyers and people actually praising his work, in a sense, to his face.
