Thanks for actually giving a serious response. We're not talking about the whole world, though, and I think you're underestimating the influence of action sports. There was something like 59.6 million skiers and snowboarders last year. Granted, maybe only a quarter of those people are "freestyle" riders and pay attention to videos/edits, but there's a good amount of us out there. This is only skiing and snowboarding so you can imagine there's millions of more people who are active in other sports.
As for your second point, I'll agree that not many of my friends have ever watched an action sports video, but I can bet almost all of them know somebody who has. Maybe most of them discovered dubstep through some other means, but I know many who were told about it by someone who heard it in sports videos.
I didn't mean for it to seem like I thought sports were the ONLY reason dubstep became popular, there's no denying that this sort of EDM revolution did most of the work. I just really believe the action sports communities have more power than we think, and word of mouth could have helped propel dubstep into the mainstream.