everything we ever know will never make a difference on anything because we are just balls of atoms on a big rock floating in nothingness no point to live,die, or do anything because nothing will ever change or last forever.
They can repair physical damage that occurs in human life. That's it. I can be repaired by a doctor than go out and die by whatever means. The doctor didn't save my life (from ending), just mended my body. He may have caused it to not end when it could have, which is what you are calling "saving life." We are worth as much dead as we are living, and that value is nothing. The value of all life is only the value which each individual gives it. But inherently speaking, live is worthless. I was born by chance, and I'll die by necessity. There's really nothing more to life than that. The rest is what our ego's attribute to it.