The difference simply lies in whether one's condition is good after the battle is won.
Moreover, Kamiyagawa has a pressing need to kill the Earthquake Catfish in this operation; only by killing it can he enter Songze right away to rescue Kanoya.
Since the overall command of this action is assumed by Kesshou Makenyu, this consideration was directly adopted by him.
Uncle Kesshou's battle strategy is centered around Kamiya, with himself and people like Onizuka supporting from the side, while also ensuring that other participating exorcists, who are on the fringes, do not suffer too many casualties.
Kesshou is well aware of how capable Kamiya is in a fight, and there's no problem with setting up battle plans like this, both publicly and privately.
...
After the meeting, the organization began to mobilize personnel urgently.
Kamiya went to Jiecheng's office.
He hadn't been sitting in the somewhat messy personal office for long when someone suddenly knocked on the door.
