I think the point is that slow overall value drift is fine and normal, but a sudden change in values and forcing them on (the rest of) humanity is not so much. The parable of Murder Gandhi is not a terrible development and not something one ought to safeguard from. Instead, a sharp sudden change is the problematic development. Removing guardrails tends to lead to spectacular calamities, as we see throughout human history, so that is what we should hope an AGI would keep.
I think the point is that slow overall value drift is fine and normal, but a sudden change in values and forcing them on (the rest of) humanity is not so much. The parable of Murder Gandhi is not a terrible development and not something one ought to safeguard from. Instead, a sharp sudden change is the problematic development. Removing guardrails tends to lead to spectacular calamities, as we see throughout human history, so that is what we should hope an AGI would keep.
I would consider a gradual murder Gandhi to very much be a tragedy, personally speaking.