This is fantastic! Science is never right, it is just (usually) increasingly less wrong.
By the way, in addition to the cognitive biases you mentioned, do you think there might have been some element of either racism or anti-urbanism or plain old great-mid-West-small-town-life-ism at work? I think personal biases allow us to decide whether to pay attention to the cognitive biases or not.
Good for you for challenging your own assumptions and fact-checking yourself.