Last year I remember another one going around about a Qing empress dowager having an affair with a Han Chinese official, and somehow it turned into this whole theory that the Qing royal bloodline had already been secretly replaced. I doubt many people seriously believed it, but after a long day, "the Qing imperial family was secretly replaced" is exactly the sort of nonsense that suddenly makes your brain go like, okay, I need to hear the rest of this.
It's kind of like the micro dramas that are popular in China right now,dumb, ridiculously, and yet somehow you still want to see what happens next.
So I think the history is almost beside the point. The entertainment value is the point.