Grind in real life or Grind in game, your choice. Whether Grind in real life or Grind in game, the RNG on akasha is the same for both type of player. They both spend time to grind, so depend on which country or your country standard of living, some place is more efficient to grind in game, some may be more efficient to grind in real life.
Game publisher still need to pay their overhead cost and all the expenses, they need someway or other to make money to pay off their expenses. If you want everything easy to get then play Maplestory 2, everything is all just grind can't p2w, only fashion need to spend over there. (ooh forget, the game is closed because not making profit.)
First of all, this isn't something you "grind" it is something you grind to gamble in the hope you get what you want which is the main issue here. You can grind an endless number of hours and still not get what you want which can be very overwhelming especially for a game whose purpose is entertainment.
Yes, companies such as this exist for profit, we all know this; however, this does not excuse them from exploiting players by preying on our addiction. And even if costs are an issue, they already get enough from the other gambling-inducive marketing practices such as the wheel which they have shown no plans on removing it. Even without these gambling tactics, I'm pretty sure they would still be able to afford the expenses needed.