The response was professionalized. That’s not surprising, because this is what organization that gets results actually looks like. It’s not a bunch of magical kids in somebody’s living room. “Can you believe these kids?” It’s been a recurring theme of the coverage of the Parkland school shooting: the remarkable effectiveness of the high school students who created a gun control organization in the wake of the massacre. In seemingly no time, the magical kids had organized events ranging from a national march to a mass school walkout, and they’d brought in a million dollars in donations from Oprah Winfrey and...