Modded Minecraft has deeper gameplay than 99% of all games ever made. If anything, high quality graphics make it harder to support deep gameplay because making high quality graphics for tens of thousands of items becomes very expensive.

Roguelikes like Cataclysm DDA also tend to be extremely heavy on the complexity side despite having "extremely poor" graphics by your standards.

6 2080TIs? How are you going to pay for that waste? Do you know how delusional you sound?