You're taking these things too lightly. It's true that most of these things are unlikely to kill all humans directly, but with most of them, civilizational collapse is definitely on the table, and that can ultimately lead to human extinction.

For example: Yes, we could probably build livable habitats in space (though we don't really have proof of that). But how many, for how many people, and what kind of external support systems do they require? These questions put stresses on society that prevents space habitats from working out in the long term.