Sisters of Battle is too challenging a concept for this section of the fandom.
This problem has been under-exposed simply because very few people here have ever seen a SoB army or really know much about them other than the fact that they are an all metal army played by grogs. SoB is a tiny part of the setting that's not adequately explored and can be compartmentalized as it's own little side show divorced from the present culture war and the present GW.
SoB came about at the time of Sarah Connor and Ellen Ripley, and when most adults would have had at least a few interactions with nuns in their lifetime. Now the idea of strong women fighters is seen as inherently politically partisan. Very few people interact with nuns these days, or even see them in popular culture. I doubt many zoomers would even know what a nun is. The idea of women wearing black robes for religious reasons is far more associated with burkas now, which is also a political landmine.
As people here are exposed more directly to the Sororitas through the Warhammer Community posts, we will see more and more backlash against them as the less intelligent sections of our community try to interpret them through the lens of the current culture war.
tl;dr retard zoomers are gonna claim SoB are Mary Sues in burkas and it's gonna fucking suck.