I will throw in an additional factor: any group, community, or segmentation of the general population wherein the participants both tend to have a higher than average intelligence (whatever that means) and whose preoccupation revolves around almost any form of cogitation, consideration, products of human thought ... will invariably get hit with some form of snobbery/envy, even if no explicitly stated intelligence threshold or gatekeeping is present.
Bluntly put, you are not allowed to be even a little smart and not all "aww shucks" about it. It has to be in service of something else like medicine or being a CPA. (Fun fact I found in a statistics course: the average CPA has about five points of IQ on the average doctor.) And it is almost justified, because you are in constant peril of falling down into your own butt until you disappear, but at the same time it keeps a lot of people under the thumb (or heel, pick your oppressive body part) of dumbass managers and idiots who blithely plow forward without a trace of doubt.
Bluntly put, you are not allowed to be even a little smart and not all "aww shucks" about it. It has to be in service of something else like medicine or being a CPA. (Fun fact I found in a statistics course: the average CPA has about five points of IQ on the average doctor.) And it is almost justified, because you are in constant peril of falling down into your own butt until you disappear, but at the same time it keeps a lot of people under the thumb (or heel, pick your oppressive body part) of dumbass managers and idiots who blithely plow forward without a trace of doubt.