Agreed, I don't want inclusion for inclusion's sake, either! It'd be like the current issue with movies being rebooted to be inclusive. Inclusivity's not the problem, it's that the stories themselves are both unfit and have grown stale. Make something new, make those characters actual characters, give'em their own history, make'em their own entities!

Late edit: to clarify, I still thoroughly believe there's no reason why we can't have diverse characters in 40k! But don't just shove'em in there for the sake of it.