>>715596069 (OP)On one hand, the Overseer was right to exile the Vault Dweller, because he would inspire the other residents of Vault 13 to risk their lives and stability of Vault 13 for knowledge and adventure of the world above.
On the other hand, the Vault Dweller was right to kill the Overseer, to send a message to the other residents, that even if they choose to shut off the insanity of the world outside, that doesn't mean that it will last forever, and it's better to do something about it now than to live in ignorance.
We saw the Vault Dweller was ultimately right. He and others founded Arroyo, while going through troubles of their own, eventually survived and formed a great society afterward.