This is a fun theory, until you realis the fight sequences are the exact same on every playthrough, nothing changes, and the hero's progress is entirely scripted. I was so excited to play this game and it turned out to be a sad attempt at a conclusion you already know before you start with a method that undermines the entire point.
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It is not a theory, this is literally a visual novel. The listed genre is "Interactive Fiction".
On top of that, there's a lot of grind based games that are exactly the same. You use the exact same moves and skills over and over again, nothing changes. You just deal that extra bit more damage for that extra hour of grind, and then try again.