Aging and cancer are also Lindy.
Two things you'll always find someone to defend with vigor are sleep and death. A lot of humans seem to despise living in general. It's fascinating to see.
Society would adapt without sleep, but ending death would mark the beginning of a nightmare humanity never wakes up from.
Sleep is less surprising for me to see people defend than death, to the extent that I'm not sure if I myself have or not done so.
I mean, I can directly feel the benefit of a good sleep that refreshes me in the morning, whereas there's those who have passed on whom I miss.
If I didn't need sleep, really didn't, I wouldn't seek to re-invent it; but of the two it is old age that I'd actively pay money to hold back, if treatments for both existed at the same cost per extra hour of consciousness in my lifetime.
Well... Sleep and death are natural. I'm not convinced you see people "defend" death so much as (rightly) acknowledging the inevitability of it.
The latter half of your comment is rather smug, but I wouldn't look down on people who have peacefully accepted reality. Time is fleeting and we are but flowers in a field—briefly brightly bloomed and then withered.