Fresno... Stupidest City in America?

I imagine like many of you I first heard of this ranking through late night comedy. My first thought was, "How can something like even be measured?" Surely they didn't take a random sample from each city and administer IQ tests? After a little web searching, I was able to find the source of the rankings on The Daily Beast.
As it turns out, they weren't measuring intelligence in the city at all. What they actually measured was educational level, political involvement, educational institutions, and book purchases. I won't argue that these factors don't have some bearing on intelligence, but they are in no way accurate measures.
I won't argue whether Fresno is truly the stupidest city or not by their measures, or even by any measures. What I will argue is whether this is truly a reasonable comparison. First of all, one should recognize that Fresno is primarily an agricultural area. This means that vast portions of our population are field workers or work by packing the produce. These jobs do not need degrees, and trying to change that would be ridiculous.
More to the point, I am intensely disgusted with any person who looks down their nose at another person simply because of their work. Some people may enjoy the feeling of smug superiority over a field-worker, but just as quickly whine about how hot it is when they exit their air conditioned vehicle. Do they imagine the produce magically floats from the fields to the supermarket shelves? Field work is backbreaking labor, and is sometimes much more technical than we may realize.
These attitudes are among the reasons that the children of field workers despise the work their parents do, and instead turn to gangs and drugs. They have been taught that intelligence is the ultimate trait, and money the ultimate goal in life. Since they have neither they feel a sense of hopelessness.
For the record, I take issue with anyone who assumes that educational level is the same thing as intelligence. A person who has completed an advanced degree is not automatically smarter than an illiterate African bushman. The bushman may not have the tools to survive in an industrialized society, but neither would a PhD allow a person to survive one second longer in the deep Kalahari.
Can we all just put aside our petty aspirations of superiority. Why not just accept that each worker has a part to play and is important in their own right.