Medicine can extend the life of our bodies but not of our brains, which remain quite impermeable to drugs. Thus, we are harvesting generations of brainless old persons, who are out living their minds, because of dementia, alzheimer and the like.

The proper way to correct this is not to euthanise old people, but a braver path: to reduce the medical expenses in our society, so that we  stop becoming over-healthy, and our brain and body die together, peacefully and naturally.

In animals, fate = destiny

Destiny: the place in the Universe where you are meant to be.

Fate: forces of Nature and History that push you toward a place.

Humans are not fated to their destiny, for the destiny is a calling, no a force. They have to respond to this calling, for they have the glory, and the burden, of freedom.

Fate carry you 95% of your way; but, then, you have to choose, among the few options left by Nature to your own will and freedoom.