Let's say we program an AI and get one little detail wrong and things go to hell as a result. We can call that "human error" or "AI error" but either way it's a reason for caution.
I am actually somewhat concerned by this OpenAI project, and here's why. Let's say there's going to be some kind of "first mover advantage" where the first nation to build an AI that's sufficiently smart has the possibility to neuter the attempts being made by other nations. If there's a first mover advantage, we don't want a close arms race, because then each team will be incentivized to cut corners in order to be the first mover. Let's say international tensions happen to be high around this time and nations race to put anything in to production in order to be the first.
The issue with something like OpenAI is that increasing the common stock of public AI knowledge leaves arms race participants closer to one another, which means a more heated race.
And if there's no first mover advantage, that's basically the scenario where AI was never going to be an issue to begin with. So it makes sense to focus on preparing for the more dangerous possibility that there is a first mover advantage.