You You Jiang Jiang!
Su xing is insanely powerful, compared to the entire sect. There was literally no reason to lie. Anyway he needs to take action when the magical beasts attack. As long as he shows part of his power, no one would say a word. Maybe if a beast wanted to be a sect/peak master, they might gave had an issue, but as a disciple who doesn't take any resources from the sect, they shouldn't care