I'm not sure JRPGs have ever really been about plot. Most of them have dead simple plots, if you break them down. They're just "go fight bad guy and save the world". Which is FINE. Because the character moments, the sub-stories within that plot, and the immersive nature of the world of JRPGs is far more important than the actual plot.

But JRPG designers keep hearing "oh, it's all about the plot", so they build up these huge, overarching plots that turn out to be complete nonsense that no one can follow and understand.