That's a very strange perspective. Other threats are good in that they are stupid, so they won't find you if you colonize space or live on an isolated island, or have a lucky combination of genes, or figure out a way to actively outsmart them, etc. Stupid existential risks won't methodically exterminate every human, and so there is a chance for recovery. Unfriendly AI, on the other hand, won't go away, and you can't hide from it on another planet. (Indifference works this way too, it's the application of power indifferent to humankind that is methodical, e.g. Paperclip AI.)