By - very good example you cite. The various ESPN channels need content, and in the winter, college wrestling can be had on lots of different days. Yet, as you point out, ESPN does not say to themselves, "Whew, easy source of content to draw our viewers by playing these college wrestling dual meets and tournaments". Instead, they show stuff like Corn Hole or even Poker.
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All of us on this forum love wrestling - and we are in small minority in the sports landscape in the eyes of commercial interests like ESPN, Fox Sports, CBS Sports Online, etc.