"If you like your Fighting F**K Toy, you can keep it."
No. You are not automatically sexist if you prefer Samus in her zero suit. You are not automatically sexist if you download a nude mod or a sex mod.
You should have the right and expectation to be allowed to enjoy your entertainment however you like it without being labelled as anything.
And this is where the problem areas begin arising. There are people who *don't* like it that the identifiable female characters are dressed like prostitutes, proportioned like a teenager's sweaty fantasy, or are mewling, weak, and frail.
It's not that they're trying to take *your* toys; it's that they want *their* toys. And the fact that they have been so hard to find for so long is something they find problematic.
Skyrim is actually one of the better examples of making sure everyone can have their toys, actually. Most of the armor sets cover the same amount of body area regardless of gendered tailoring, but some certainly cover more than others (Looking at you, Foresworn).
In this fashion (even before mods), the amount of clothing your character has (regardless of gender) is pretty much dictated by the player. This is a win for everyone.