Paranormal Livestream! Why Are All the Rewards Skills for Dark Cultivators?

Streamer Qin Tian gets a Paranormal Investigation System. Completing its missions earns him rewards. His first mission is to burn incense and eat offerings at a crossroads in the middle of the night? This damn System really knows how to push it! System: Reward, Ghost Command Art, which lets you enslave spirits and use them as you please. To claim the reward, Qin Tian starts livestreaming to debunk superstition. “Listen up, folks, ghosts don't exist. From a scientific perspective, they're neutrinos, or radio waves!” “There is absolutely no such thing in this world...” “Holy crap, damn female ghost, let go of my neck! I can't breathe!” He finds a love letter from a red-clothed vengeful spirit? System: Reward, Soul Devouring Art, which lets you consume the souls of the dead to prolong your life. Qin Tian: I'll write back to the red-clothed ghost and meet her in person! Qin Tian: System, all your rewards are evil cultivation techniques. What am I supposed to do with these as a streamer who debunks superstition?