The secret conspiracy that understands how to perform a proper integration of technology and magic, of course. Why do you think it’s forbidden to study that? Sure, the occasional flying car isn’t going to do any harm, but if people get good at that sort of thing, they might figure out how the entire television broadcast system is establishing a sympathetic magical connection that allows the wizards to drain the life force from the muggles. That’s why you get all the uniformity in popular culture: these are the people who are most susceptible to having all the magic in their souls siphoned out through the TV set.