What's silly is this comment, as it has in no way furthered the discussion. It only enables one to feel smug for a hot minute. Surely you're smart enough to infer that "natural causes" are said in contrast to "human-made causes".

Silly perhaps, but conventional, as humans like to think of themselves as capable of cooperation to solve challenges larger than any one person, and to think of themselves as wiser than (other) animals and thus able to see these challenges well in advance.