He was also always in the frontlines even if he had a vacation and only visited the capital a few times because he knew that his condition was very dangerous.
As long as his mania was triggered he doesn't know how many people would be sacrificed to stop his rampage.
With his level once his mania was triggered it would be a disaster. He would surely cause a lot of damage once his mania was triggered in the capital star which is full of people.
He would need a lot of capable people to stop himself as his level already surpassed a lot of sentinels.
It would also be likely that the people who would stop him would be the people he knew.
Layton Lewis didn't want that to happen so he was always staying at the frontlines even though staying there would only worsen his condition.