Like for example someone piercing through someones brain and then eating it? LOL!
I'm using this as an example to point out the paradox of being fine with people being murdered in the most brutal ways possible, but not being fine with showing some boobs.
its actually an interesting topic. i was wondering myself what and how much of it is ok "because its just a game". the mk violence is a glorification of the most brutal possible abuse humans (or in this case humanlike beings) could do to another. yet, real life socially normal people can just shrug and go over it, even appreciate the aesthetic value of a fatality. still there are things which i might not just shrug off and still enjoy the rest "because its just a game".
i had a discussion with my gf why that could be, and she thought that human intuition might not tolerate the affirmative depicting of the exercise of destructive power over the helpless and innocent. in mortal kombat, there are still grown-up warriors put against each other who should kinda know what they are doing and be not helpless.
think about it, what would trigger you more? the affirmative depicting of baraka ripping raidens brain out and eating it, or the glorification of nazis shooting an innocent jew? both is in a game, both not real, and the first one is far more brutal than the second, but i guess the second would trigger you worse.
now going back to sexy clothing, its psychologically complex. yes there are grown up women with free choice of clothes depicted in the game. and many rl females would actually not find it offending, or theyd even like it. but not everyone is that confident. we are NOT living in a real world with equal rights, but in one where women might in fact be systematically treated bad because of their gender by powerful institutions like law or common beliefs.
so i guess thats why a picture of women as an object of male lust can be triggering, because people who are in average still in a socially weaker position than men, but fighting to get out, are even affirmatively pushed further into a role they dont want for themselves by a popular medium. i can see the legit point of it.
thinking outside the box a bit, female mk characters and violence against them at all might just be accepted because women luckily already stepped out of their "kitchen, children and need of male protection" role since the 1950s. if they had still that weak and dependant role, there might be an even bigger, and from a certain view actually justified, moral outcry about them being fightable characters put against men at all.
but ironically, the more confident and powerful women in fact become, the more sexyness in games might be ok, because everyone including women assume a self-confident decision and not obedience to an abusive and destructive power behind it. but we are not there yet, and im absolutely cool with some sensitivity. and personally i usually like my vg women better in a cool outfit than nude-y anyway.