- Because most wizards don’t have a clue how to interact with the muggle world. Even those, like the Weasleys, who are not prejudiced and do not see muggles as their inferiors, still do not understand the muggle world. Mr. Weasley, whose job involves working with “muggle artifacts”, does not know how to use a telephone and asks Harry about the function of a rubber duck. Other wizards show no understanding of muggle clothing, dressing themselves in unique costumes such as a kilt and a poncho, a flowery nightgown, or a frock coat over a swimsuit. If wizards are required by law to keep their existence secret from muggles, and yet sometimes need to interact with the muggle world, it only makes sense that they should learn enough about that world to be able to blend into it.
- Because the wizarding world is behind the times. That’s true on many different levels, but let’s talk about the most obvious, practical one. Can you imagine the shock of a muggle-born student arriving at Hogwarts and realizing they’re expected to write with a feather quill and inkwell? That might seem exciting at first, but paper and pen – or better yet, word processing software – would grow more and more appealing after late nights doing homework. Yes, I know that magic and muggle technology don’t mix, but Hogwarts has indoor plumbing, and the Weasleys have a radio. Those were both new inventions at one point, and have clearly been adapted to work with magic. I bet, if there was more awareness of the muggle world, someone would figure out magical equivalents to computers, internet, airplanes, and all kinds of other things that the wizarding world seems to be without. But with very few kids gaining any exposure to the muggle world, the wizarding world seems to have stagnated.
- Because there are other things wizards can learn from the muggle world, besides the joys of modern technology. Specifically, our history. They could learn that prejudice and discrimination are never acceptable. They could learn that putting the wrong person in power can lead to disaster. They could learn that those who seek to control people usually begin by limiting their knowledge, and so people like Umbridge must be opposed. Those are things that sadly are still problems in our world, and lessons that we can learn from the Harry Potter books; within the stories, they are lessons the wizarding world could learn from studying muggle history as well as their own.
- Because despite the International Statute of Secrecy, the muggle and magical worlds do overlap. Muggle-borns find out they are wizards at age 11 and become part of the wizarding world, also bringing their families into that world to some extent. Witches and wizards fall in love with and marry muggles. Children from wizarding families do not always have magical powers. Many witches and wizards do have to exist between the two worlds in one way or another.
- Most importantly, because ignorance breeds intolerance and understanding makes peace a more realistic goal. Would Voldemort have been able to get the support he did if he had not been able to draw on an existing hatred (and fear) of muggles and muggle-borns? Would that sentiment have been as strong as it was if all magical children were taught about the muggle world and taught to respect it? Perhaps the reverse is also true, and the magical world will not allow their children to be taught about telephones and electricity until they have gained more respect for those without magic. It’s hard to say, but I feel sure that the series’ villains’ intolerance of all things muggle goes hand in hand with their ignorance.