Whilst chemistry is getting close to an exact science. biology and medicine are currently very inexact.
We are butt a few steps up the ladder from shamen..
We are like chimpanzees trying to figger~OUTT how a supercomputer works by banging keys on a keyboard and seeing what results on a monitor screen. We are still i the very early stages of the First Biological Revolution in science.Somewhere between the Wright Flyer and the Sopwith Camel.