Why does almost every pack want to kill my sims?

I’ve yet to have a Sim die in any way other than old age or drowning, I think. I do wish there were actually more ways Sims could die, like why don’t Sims die from illnesses???? Quite disappointing and I don’t see why they can even get sick if they can’t die.

Or at least there was less warning/ability to prevent death. Sometimes I want to be completely caught off guard.