My take on lower sales as a FF fan:
FFXVI - not a JRPG by genre, so fans of the FF series (like me) might pass. Also it was PS5 only until this week. $50 PC release is nicely priced though might get it.
FFVII Remake - while good added many pointless cutscenes and incredibly stupid whisper/fate subplot. People thought they were getting a remake of a masterpiece. Instead got 4 hours of intro content bloated into 40 hours.
FFVII Rebirth - looks better than Remake but not sure. Release on PC and I’ll buy.