On the view that there is no fate worse than death:

There is simply nothing worse than permanent death - because it cannot be repaired. And everything else can be repaired, including the damage from any amount of suffering.

permanent death is the only brain state that can’t be reversed, given sufficient tech and time … The non-reversibility is the key.

An interesting perspective, but appears to assume human immortality. One does wonder if suffering that can’t be reversed in a human lifetime, or suffering that takes generations to dilute away would still be preferable to a life lost for this writer.