there are 2 JRPG, one is based on story or "story driven", normally the focus is on characters and a decent plot an epic ost and a friendly game mec, and to fully enjoy the plot i admit that grinding can be really boring and you lose the tension of the plot, than there is the other kind of JRPG / hack & slash / enemy waves.... and there grinding and the challenge are the game, so if you cheat you fail to play the game as it was intended.
Personally i only cheat when i see a side quest like bring back 10 plants from xxxxxxxxx forest, and the quest pop right after i have been there 10 minutes ago.