It really isn't about intelligence. I know multiple very smart and hard-working people who "relied on their instruments" and took at least one shot. We are talking about people who take in massive amounts of information and can quickly and efficiently analyze it and come to correct, prosperous decisions. They don't have time to sift through all the lies, especially when the lies are being pushed from "both" (all) sides of the media. They have done the math about arguing with the entire medical industry (shoot - I can't even convince my Uncle M.D. that type 2 beetus is curable), looking for banned media (Alex Jones, etc) or otherwise going against the grain. It's a battle they aren't willing to fight, because what are the odds that [all of this is a giant lie meant to depopulate or worse]? Maybe all the smart people you know are purebloods, or maybe you have removed anyone from the "smart" category *a priori* for taking the shot. But I don't think it's as simple as you make it.