You know what is truly, truly hilarious about all these conversations and "controversies"? People still have not figured out the reason why the vociferous opposition starts so quickly and loudly. Gaming is a young medium and as such we have had "Moral Guardians" knocking on our doors for quite some time. Whether it was people like Jack Thompson and his accusation of "murder simulators", parents decrying that games will turn their child violent/stupid/whatever or people outright trying to get games banned, we have seen many people attacking games and gaming in general based on their content. However little hew and cry on content had come from gamers themselves. Few gamers protested that Doom was too violent or Dead or Alive too risque. We lived and let lived but we recognized calls for censorship as the voice of "the Enemy". People who seemed to have an irrational hatred of our hobby, of the medium we enjoyed and the entertainment we derived from it. Like any new medium, gamers became a community. An extremely divided community, yes but one all the same.
Do gamers complain? Yes but it has mainly been about quality. The Mass Effect 3 ending was criticised because the players felt let down by its quality, that a franchise famed for its story branches and promising that our decisions would have consequences ending on a choice between three button presses. We criticise even our favourite developers when they serve us a bad game. Assassin Creed fans did not give Ubisoft a free pass for their buggy messes and neither did Gearbox fans when Aliens Colonial Marines hit. However much of these did not concernewhat sort of content there was in games but rather the quality of the content itself.
Little wonder then when websites attacked gaming and gaming culture, throwing accusations against the character of the entire community, gamers pushed back. Calls for any kind of censorship have, perhaps subconsciously, been seen as the tools of "the Other", of "the Enemy". After all, this was true at one point in time. People were calling for games to be banned or censored. The fact that the modern calls for change come from a particular part of the political spectrum only makes it easier for certain segment of gamers to see them as the modern incarnations of Thompson and his ilk. Except that this time, instead of destruction they are quite content with castration and neutralization. Not exactly a true picture, sure a very radical fringe might subscribe to this view but most people who do ask for these changes are, I believe, generally well meaning. Unfortunately (and perhaps ironically) they are literally stepping on Gaming's trigger, we have become so defensive about the content of games because it has always been used as a weapon against games. For some gamers, this immediately stirs up a hostile response rooted in their love for their hobby. There are no heroes or villains here, just people with differing opinions. If only we could meet halfway and keep everyone happy, that would be great. Sadly that is about as likely as me walking down a tunnel and being granted the power of Shazam.
The fact that many older gamers are also fans of niche genres like Fantasy and SF or mediums like Comic Books and Tabletop Gaming only exacerbates the antipathy against "Moral Guardians" and "think of the children" mentalities. We have seen what happens when these people win. Fredric Wertham's 1954 book Seduction of the Innocent was used in court to attack the content of comic books and the subsequent Comics Code Authority eviscerated the young medium. There used to be many, many genres but due to the requirements of the Code, only superhero comics thrived. Mystery, horror, war and pirate comics all folded, if not for that perhaps Comic Books in America might be as diverse as manga is in Japan today. We have seen it happen and I cannot imagine that any of us want a repeat with video games.
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TL;DR: We've seen content criticism as something the outside uses to attack gaming for so long that when gamers use it nowadays it triggers a kneejerk reaction.