The proposed genetic bottleneck around the time of the eruption was long ago—when the human population may have been very small anyway. Today, we have six billion humans. There are better defenses against such things—in terms of stocked underground bunkers. So: a modern volcanic eruption would have to be vastly more destructive to kill all humans. The probabilities involved are miniscule, and shrink with every passing day. It is only because of a “Pascal’s wager”-style argument that people can be made to consider such risks.
The proposed genetic bottleneck around the time of the eruption was long ago—when the human population may have been very small anyway. Today, we have six billion humans. There are better defenses against such things—in terms of stocked underground bunkers. So: a modern volcanic eruption would have to be vastly more destructive to kill all humans. The probabilities involved are miniscule, and shrink with every passing day. It is only because of a “Pascal’s wager”-style argument that people can be made to consider such risks.