The grind is for people who cum fast. The grind gives them enough time to cool off. Keeping them on edge.
It also extends the play time to justify the price.
this in itself doesn't make the game or its gameplay worthwhile, at least not for me. which, yes is my opinion but aimed at people who might be considering or buying this game.
being an artist doesn't excuse bad or repetitive game design.
and just to be clear, i can absolutely see the hybris of my statement since we are on a piracy site, it was aimed at those who might consider buying the product