TLDR

Way too long, meandering, full of anecdotes.

How is it at all surprising that trying to "fix" problems with the body is uber-complicated?

Plus, there's the obvious missing bigger point - all these companies are trying to find a solution that is a pill, as opposed to changing the underlying problem: bad food, bad environment, bad physical conditioning, etc. Billions spent on finding pills, very little money in solving the root causes...