I sorta agree with you. It says in the lore that when men become Howling Banshees, they squeeze into female armor. It makes sense that for the rest of the aspect warriors it's women squeezing into male armor. The aspect warriors are aspects of a male deity, after all. Guardians and seers, them I can see with breastplates.
dont forget that eldar armour reshapes itself to fit the wearer .... so why would male eldar have boobs plates if their armour reshapes itself? http://wh40k.lexicanum.com/wiki/Aspect_Armour
Unless my reading comprehension is off, that can be answered by the very link you posted. "It stiffens on impact much like Mesh Armour although it also includes further rigid plating to reinforce it further."' One must also not forget that each aspect is supposed to represent the Phoenix Lord it descends from. Dire Avengers descended from Asurmen and thus appear male. The Dark Reapers descended from Maugan Ra, and thus, also appear male. The only aspect to have been female is the Banshee as it descends from Jain Zar. Also... A male Banshee is not a Banshee by the simple definition of what a "Banshee" is. Though a male can definitely play the part, he still has to be in aspect.
then we'd get into the arguement over which plating is rigid and which isnt just accept that GW told bE that Eldar can be any gender regardless of class and dont worry about it lol
That has absolutely nothing to do with the discussion. The discussion is on the armors appearance, and that male or female, they wear the same armor and it is a uniform appearance.
Oh man... what about Warp Spiders? I'd teleport behind the enemy and murder him with their handknifes...