Kishimonto... he does not like characters dying.

Kabutoro saying that he has problems controlling all the zombies, the zombies are still aware of the situation (and have their own opinions)
so, if something was to happen to Kabutoro, would the zombies be free? or would they insta-die?
same thing, Kabutoro can just be in a orochimaru-cycle of coma-resurrection, and then everyone will be alive!