Yeah, that whole line about how “spiritual regeneration” requires some kind of “bipolar loop” between “yin energy and yang energy” is a whole load of horse crap, because it doesn't stop the yuri scenes, now does it? Just admit you don't wanna do BL scenes or explore penis-fencing, mate. That's way less cowardly than working out some kind of “in-universe” explanation about why it makes sense. You've got people fucking sapient magical objects who have no reason to be any particular gender, or even have gender at all.
Even having the author breaking the fourth wall to just admit that they couldn't do BL because of sheer cowardice or didn't want to scare the straights would have been better than just… this.