There's more to it than just safety: in Dario's psychopathic mind, obtaining advanced AI will lead to massive military advantage, hence "we" must do it first to prevent "them" attacking "us". See where it's going? Suppose it happened, then what? By Dario's logic there are two possible continuations: 1. start a war by attacking first and 2. do nothing and waste the entire effort because "they" will obtain the same capability a bit later.