We don't even know what a world with less death would look like, if we could be able to delay death, why wouldn't then be able to focus on stagnation, overpopulation and resources. And if something can be done I believe it will be done, if we want it or not.
I'm really sorry to hear about your mom. It's tough to see a loved one going through something like that. Wishing her strength and recovery, and hoping you get to spend many more happy moments together.