No other human activity poses this level of danger. I do heed the warnings, but this comes across as detached hyperbole. See: global warming, nuclear weapon development, wealth inequality, war, technology dependence, etc. Also, this has nothing to do with LLMs or computers. Like all things, this is about humans.
Those are things that pose potential harm to great fractions of humanity (multiple billions of people) but none of them poses any threat to the actual extinction of all humanity.
Survival of the species isn't enough.