I think the thing which the article completely misses is the difference between survival of the species vs. survival of the individual. There are very few things which threaten the survival of the species: nuclear war, massive volcanic eruption and asteroid impact. Other things, such as disease, significant climate change etc. may kill a lot of people but they are unlikely to affect the survival of the species directly - even ebola has survivors.
People who worry about asteroids don't do it because of the risk to themselves personally since that risk is negligible. They do it because of the risk to the species. The risks of these sorts of events are incredibly low. However if you compare a "1 in 100 million" chance of an extinction-level asteroid impact with the similarly tiny (and probably larger) risk of a massive volcanic eruption then suddenly the odds become more relevant. The article completely misses that point.