It is the new medium that old generation either has no experience or has loose second hand experience. For example, I highly doubt any of the US Senators bemoaning video game violence actually play games. They hear or see something and think "kids should not experience that!" even though the average gamer is in their 30s at this point in time.
You can see this disconnect in film's portrayal of games as well. My favorite is seeing a game you know has a gorgeous full orchestra sound track and the film overlays 80s arcade sounds because "that's what video games sound like, right?"
I'd say by 2030 much of this double standard will be gone as parents will far more likely to play and understand games and be able to educate their children far better.
