I call BS. Major BS. Do you have citations for any of these claims, such as how the GREs show that individuals are "naturally gifted" or willing to "work hard enough"? Or that "most people who think that the GRE is stupid and useless also have low GRE scores"? Have you ever heard of test anxiety? How about subject-specific intelligence? Or perhaps just thinking outside the box?
This is the truth: the GREs are great at measuring one thing - how well you do on the GREs. The end.