As a graphics designer - I can 100% agree with this WHOLE post. Even though I do have the AdamK Graphics pack and use it, I don't over do it. What I mean by that, is all people do is add a simple render, text and load the thing up with effects.
For me, I try to make my own style. My intent is to make things where people are able to easily recognize I made it, I want to create my own style of GFX that people can look up to.
As you said, originality is hard to come across. People try to find the 'easy way out' while still being credited for their work.
Yes, they did do it themselves and they did do the work, but they didn't create the style of the work.
Those are my 2 cents.