The fact that the wizarding world is able to be this aloof about 99% of the population they live amongst is incredible. In a real world that would be due to a tireless cadre of extremely knowledgable and capable wizards working to keep them separate. Unfortunately the fact that some hack like Voldie could make such a mess of things so easily kinda disproves that. Therefore the wizarding world is the luckiest bunch of idiots ever.
The story takes place in Britain and the vast majority of the characters barely, if at all, know what Football(aka Soccer) is. Mr. Weasley the muggle "expert" doesn't know what a rubber duck is for. They're not gonna know shit about some American muggle sport.
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