C3414 It's Fate
Because of Chai Zhou's question, Jiang Ting's mouth twitched slightly. His Daoist appearance did not mean that he was really a Daoist. He only called himself a Daoist because he was too lazy to trouble himself.
As for why cultivators dressed like Daoist...
Strictly speaking, it should be because Daoist temples and whatnot in the mortal world like to read ancient books