The Great Xia Court does not prohibit demon cultivation.
As long as demon cultivators cultivate according to the system, the Great Xia also recognizes them as members of the Cultivation Realm.
But here's the problem.
If demon cultivators cultivated according to the system, why would they still be demon cultivators?
The reason they are demon cultivators is that they seek fast cultivation, the shortcuts!
To grow quickly, demon cultivators can't avoid killing and looting.
Assassinating cultivators is too difficult and troublesome, so they can only target mortals.
However, often as soon as they move, the Imperial Guard of Great Xia finds them.
The Great Xia Court deals very severely with cultivation sects that harm ordinary mortals.
At the lightest, they are executed on the spot, at the heaviest, the entire sect is wiped out.
Heaven-Facing Sect was wanted and hunted by the Great Xia Court precisely because they harmed too many mortals.
