MGSV: People are upset about costumes, but not child soldiers?

Let me start this off by saying I'm not at all oblivious to the over-sexualisation of female characters in a lot of video games, films and comics. There is a lot of valid criticism surrounding the outfits of Soul Calibur's Ivy and DC Comics' Power Girl.

I don't really feel in that great a position to comment on when it wanders into ridiculous territory, but I'm fairly certain something like Dead or Alive Beach Vollyball qualifies. I'm not here to enter the debate about the recently released full render of Metal Gear Solid V's character, Quiet, but I'm a bit perplexed by the discourse surrounding it.