Did you not straight up say that playing too much WOW makes you less imaginative Mercurius?
How is that different from saying that people who play too much WOW are stupid?
Well, I'm not Mercurius, but I have known some very, very smart people who didn't have an imaginative bone in their bodies.
So my first point would be that smart != imaginative. People have many different mental faculties, and the more you use one, the stronger it gets. At the same time, the more you fail to use one, the more it atrophies.
F'rex: in high school, I was a math whiz (college level calculus) and a fluent Spanish speaker. In college, I decided to major in History, and took no Spanish. Post-college, I went to law school, and am now an attorney.
In the intervening years, I used virtually no Spanish and no advanced mathematics. Those skills have been lost to me. While I could get them back, it would involve an investment of time that I presently lack. Now, when I'm asked to do more complex math problems, I reply "I went to law school so I wouldn't have to take any more math." At the same time, my writing style has completely changed. Where I once was a reasonably accomplished fiction writer, I've spent a whole lot of time working on relatively dry technical writing. As a result, my creative writing skills lapsed.
Recently, I started keeping a journal of short fiction. As I do that, I find my creative writing has improved. In another six months or so, I might even be willing to share it with someone else (or at least disable the incendiary device I store in the lock box with the journal).
I don't think of myself as stupid. Maybe I am. But I do think that if you don't exercise certain mental faculties, you get rusty. WoW (which I have played extensively) does such an excellent job of presenting its creators' vision that it leaves very little to the imagination (less if there are female night elves involved).
Just my 2 cp.
--G