The idea behind nuclear wars, asteroid strikes, or super volcanoes isn't that the events would directly kill every human being, but that their associated effect

The idea behind nuclear wars, asteroid strikes, or super volcanoes isn't that the events would directly kill every human being, but that their associated effects would. In all three cases, throwing large amounts of dust into the atmosphere would rapidly cool the Earth, making it more difficult for farmers to grow crops, and creating large-scale starvation. I do not disagree with you that any location on Earth is more amenable to human habitation than outer space, but I do not think that there are facts to support your claims that an event that would drastic change the Earth's climate for the worse would not affect humanity.