If you're arguing that such behavior follows logically from character and situation, then it doesn't really qualify as a writing weakness, does it?
I believe it's been made clear that the weakness was failing to follow the story's own premise to its logical conclusion. Q might feel nothing when he creates and destroys his little pocket universes, and the beings in them, but that doesn't mean that Riker should feel nothing when consigning his own creation to oblivion (assuming she was created out of nothing). As already stated clearly by T'Girl
, the example of writing weakness under discussion was in the story's treatment of the Klingon female as an object, when according to the story's own logic she should have been a being in her own right. I think it's a sharp observation on her part.