I do wonder about the overlap. There are a LOT of people playing games and many people in that group don’t give a crap about games as an artistic medium. “Games should be fun”, you will often hear, and many in that crowd actively reject anything that doesn’t fit their idea of what a game is–e.g. Gone Home, Dear Esther, really any of the recent narrative-first games.
On the other hand many of the creators and passionate enthusiasts do believe that games are an artistic medium and appreciate real critique. Let’s not forget that Sarkeesian actually got a TON of funding to make these videos. As an enthusiast and sometimes-creator I think these videos are invaluable as a conversation-starter and a way to introduce a easily-accessible way to start talking about feminist issues in games.
I would hazard a guess that the group of gamers who wish the haters would grow up is larger than the group of (very vocal) haters.