Graphics are the least of your/their problems. Lots of hot games today have 'meh' graphics, but are still generally enjoyable — Minecraft, Stardew Valley, Valorant, and dozens and dozens more have subpar graphics. And don't forget the classic old games that people still play today like Age of Empires, Starcraft 2, etc.

What most P2E games right now lack is enjoyable gameplay. If all your userbase are playing the game solely just to farm the game, then your game's economy will easily collapse. There should be a healthy balance between farmers, and people actually playing the game because they simply just enjoy it.