It looks like I missed the entire point of the original post.
To clarify I am not suggesting use of prescription drugs as a cure all. My point as that we can think of ourselves as complex machines and apply engineering thought process to improving ourselves. One of many ways to approach this is to measure what we can and see if any data points are outside normal range. If something is out of range there are multiple ways to address the issue. Personally, I favor more natural approaches like diet, exercise, sleep, etc. but that is up to the individual.