These are Skitarii. These models are androgynous, they display no primary or secondary sexual characteristics, yet the unit contains both males and females. We know this because, canonically, skitarii are made of augmented men and women, and we also know they look the same because of examples like the mechanicus video game where basic skitarii art is used for both male and female npcs.
Now the reason this doesn't trigger retards is because there is no expectation in the first place that they must be ultra masculine or feminine? Why? After all as you claim a male MUST be ultra masculine and a female MUST be ultra feminine. This is false, clearly, so again I ask why is there an expectation that sisters must be ultra feminine, particularly with regards to openly displaying sexual characteristics which even marines do not do (with the exception) of a single unit? There's hardly a lore or historical grounding for that expectation, so why is it considering an automatic and legitimate one that I should hold and judge the models by?