If elder Jiao could stay by Lin Yi's side all the time, he'd be able to avoid a lot of detours! The ghostly thing could replace elder Jiao, but it was a spirit beast, after all. It might not know more about the human race than elder Jiao.
"It's good that you understand. Go figure it out yourself!" Elder Jiao smiled happily, as if Lin Yi was a promising student. He'd only just realized this himself-he'd have told Lin Yi about it already if he didn 't.
Elder Jiao was an onlooker, and the reasoning was simple. It wasn't that Lin Yi couldn't think it through, but he'd missed out on too many details in the game.