If you look at timescales large enough you will find that plenty of extinction level events actually do happen (the anthropocene is right here).

We are living in a historically excepcional time of geological, environmental, ecological stability. I think that saying that nothing ever happens is like standing downrange to a stream of projectiles and counting all the near misses as evidence for your future safety. It's a bold call to inaction.

Obviously this is all true. There was an event in the 5th century that meant we had no summer and all crops failed for 5 years, we all almost starved then. And that was only the most recent of these types of events.

It's not that it can't happen. It obviously can. I'm more talking about the human belief that it will happen, and in our lifetime. It probably won't.