User blog comment:B214/Question and Answers 6/@comment-120.20.138.121-20170109132412/@comment-29963364-20170111215051

Well, if you consider the fact that with the death of the Biblical God and the Original Satans, the divide between Demonic and Holy powers has become "blurred", and the [Heaven System] that creates miracles and makes Holy objects hurt Devils has become weaker, and less effective.

So it actually makes sense that Demon and Holy Swords don't appear to be as "effective" against Angels/Fallen Angels/Devils as they should.