I don't know why this is so confusing for you guys.
The chainmail bikini is a trope that is often used in a sexist manner. Browse the trope page, and you'll find that the vast majority of the examples are women. But the trope can apply to men too. The trope is not inherently sexist, but it is often used in a sexist way, as it was in the original artwork for D:OS.
If Larian were using the trope in D:OS2 in a sexist way, then I would definitely be protesting it much more aggressively.
But they're not (as far as I can tell).
What I do notice, however, is that when you put armour on a human, lizard or dwarf, it looks like armour. When you put the same armour on an elf, it transforms into an immersion-breaking chainmail bikini.
