Again, let me reword this:
I'm just saying, if you excuse the issues in games media as being "it's just video games", then you can excuse the sexism and misogyny by also saying "it's just video games".
Sure, it's just video games, but why settle for shittiness in video games when we can not? That works for both ethics in journalism, and issues of sexism and exclusion.
I think you're missing my point, Gamergate suggests that it is fighting to eradicate nepotism and cronyism from video game journalism, but these are inherent human social constructs, we inherently favour people we like, it's part of our social make up. To attempt to eradicate it is as nebulous an idea as fighting a war on 'terror' or thinking that one day humankind will eradicate racism. It won't happen, these things, however socially unacceptable they are, will always exist in some form.
I really don't think you can equate sexism, misogny and transphobia, ideologies that ruin people's lives and actively oppress minorities with someone giving a favourable review for someone they like's game, in a sea of video game review websites, magazines, Steam, Twitch, Youtube and all the other platforms that you yourself can review a game before you purchase it. Dead Island went platinum on preorders alone off of a trailer and that game was shit.
Everyone is guilty of so called 'unethical' bias, if I were a game reviewer I might give a Crusader Kings III a better review that in deserves because of how much I played CK2. Conversely I might give the latest COD a shitty review because I hate that genre of game or I might give a bad review to WWE 2K16 becase CM Punk was once a dick to me at Comic-con. Absolutely impartial subjectivity is impossible. Gamergate is wasting it's time.