In this context, I wouldn't consider weak-willed to be a moral judgment, because I don't see how it endangers others.

I'm afraid I still don't see it, really. If I say "he's a good person," then sure, that sounds like a moral judgment. But if I say "she's a good actor" or "that's a good piano," I think it's pretty clear from context that I'm judging with different standards than morality. Likewise, if I say that a food is good, I'm probably judging by a standard of healthiness or taste, not a moral standard.

I hope I'm not coming across as argumentative; I'm just interested in your viewpoint, but I don't entirely understand it.