It's BECAUSE of the generic, boring medieval fantasy settings that they were successful.

I don't believe you. That game exists, it's called Starfield, and it failed specifically because of its sci-fi setting and for no other reason.

Rogue Trader is actually good, but people who eat up medieval fantasy slop like BG3 will probably hate it.

Could somebody please explain fo me how either of these two aggressively cliche and generic games are in any way "ambitious, weird, and unexpected"?