Excellent point. My dad, who was a journalist for 30 years, always complained about this assumption among his colleagues. Journalists are taught to go talk to the people in charge, and the idea that there is some group in charge of an industry is just an unspoken--and often unthought--assumption about how business works. Obviously it's ludicrous, but it's a side effect of being taught to look for the "big picture" to get the big story.