Women in the Imperium
I know the canonical reason why their are no female space marines, the Emperor only made male primarchs and as a result only men are viable candidates for gene seed implantation, I want to know the reason that this has never changed, because the only thing that comes to mind is that the folks at game workshop are misogynist bigots and I don't think that is true. The existence of the Sisters of Battle shows me that GW has nothing against women and has no problem with the idea of female warriors. The Imperial Guard has been unbiased for some time and Lt. Mira of Graia shows that you don't need to be a man to have balls in the grim dark future of the 41st millennium.
Yet the sisters of battle are a far cry from the space marines. The only thing that the sisters have over the Astrates is their faith powers, but does that make any sense?
How does canon justify that the Sisters have magical powers derived from their fanatical faith in the Emperor that the Space Marines, the Emperor's Chosen, lack?
It seems to me that in the next edition GW should retcon things. Make it so that orthodox chapters like the Ultramarines are mixed, make the Sister's of Battle an all-female space marine chapter. Then make faith a power that space marines can use but have the sisters of battle (and the black templars) have a bonus when using faith powers.