I think part of the problem is that many people don't know how to give constructive criticism any more. On any site for artistic expression, how much feed back is either, "OMG, that's so awesome!" or "OMG, that sucks, you should delete your account now." with little in between either extreme. In that regard, I can understand creators not wanting to entertain feedback.
However, these creators have to realize that:
- Constructive feedback is a key part in self-improvement,
- Not everyone is going to offer their feedback in a constructive way, and
- Posting stuff on a public site tends to invite feedback -- wanted or not, constructive or not.
Those creators that dismiss truly constructive feedback with a "don't like, don't view" attitude are definitely piss-off worthy.