We cannot be essentially destroyed; we cannot have our wills co-opted and still be what God made us to be; the unrepentant among us cannot be allowed to roam free. What can be done with the likes of man after death and for eternity? Those that repent and embrace Christ can be cleansed and remade and then freed to live in agreement with God. Those that do not repent must be locked forever into an environment that will keep them from expressing their sinfulness.
Annihilation is clearly unscriptural; universalism is as well; inclusivism is and isn't at the same time. For the incapable children of believers, inclusivism is absolutely true. For the incapable among unbelievers there is some reason to be optimistic that it might be true. For what I'll call "noble savage inclusivism," the doctrine can only betray the semi-pelagianism of the one promulgating it, and it is patently untrue.