Easy answer. Used too much. An especially weak argument when the one finding it “funny” is never from the area it’s happening in, and thus doesn’t actually have any emotional connection they’re needing to cope with.
You know there are still a couple recordings floating around from people who had tried to call family and/or 911 prior to dying in 9/11? I’ve found anyone who listens to those seems to stop making the 9/11 jokes. Strikes me odd. Must have made it real.
Really, it’s babies’ fault for not staying ahead of the game. With all the germs they roll in and all the poop they produce, they should have something to show for it by now.