on the plus side, if "uhhh idk sith ruins underneath jedi temple" is canon now for trying to explain that plot hole, it means i have even more justification for declaring that my SWTOR sith character persists up to prequel era at least by being the reason that somewhere in the jedi temple there is a sign in comic sans in a breakroom somewhere reading:
"DO NOT TALK POLITICS WITH GHOST!!!!!!!!!!
(recipes ok)"
"that was a long tea break, is the kettle on the fritz again?"
"no, just that sith ghost talking at me"
"ah. did he read you his manifesto again?"
"only partially. but it's fine, since i got a really good recipe for vegan buttercream frosting out of the deal"