Very true.
The leftists always ignore the 500lb gorilla in the room, which is ‘death from above’, when it comes to discussion about what will ultimately ‘kill’ us. I suppose the reason that is, is because they can’t use the possibility of a comet striking the Earth as a means to manipulate people, extract wealth, or micromanage their lives.
/bingo
When mass extinctions have happened, they’ve led to the ascendancy of different taxa of critters either underrepresented in the previous fossil record, or arisen by accelerated mutation due to mutagenic effects of the impactor or impact by-products. Mutation is the only source of speciation, and that’s on a good day — mass extinction removes any remaining need (a psychological one, at best) for natural selection as the origin of species.