Everybody dies from something so there'll always be a top cause of death. I think we accept diseases of old age like heart disease and cancer as an inevitable part of being human. Sure it'd be nice to cure them. It'd also be nice to have immortality.

You could go further and say brain death is the leading cause of death, affecting 100% of Americans. Let's put more effort into transferring our consciousness into computers so we can survive it! Again, it would be nice but seems tolerable to carry on as we are.