Kahuna's are chosen by the Tapu's. When he dies Bulu will just choose someone else.
Also he was part of the international police, investigating UBs with Looker and unnamed partner. The partner being a Faller, was simply bait for the UBs and InterPol knew that. Looker & Nanu failed to protect them.
So now he's just depressed dad cop who lives in a cheaply rented place with a bunch of Meowth.
