Is it wrong to cultivate in the dungeon?

He was just trying to get some sleep. Then bam! With no explanation, he finds himself in a village burned to the ground with a dying woman giving him some fancy manual on cultivation. The whole situation screams Xianxia to him, which isn’t great. A Xianxia world is probably the worst world to get trapped in, but at least he can cultivate. Though something about this place seems a little off. Gods, adventurers, and dungeons? Are we sure this is a Xianxia world?