I think you miss the point of the article a bit. I believe what he's getting at is this: there tends to arise bottlenecks in any growing organizations which prohibit them from moving as fast as every individual operating at full capacity, whatever that individual's capacity may be.
Intuitively, in smaller organizations these bottlenecks are fewer, and in an organization of 1, your individual capacity is only limited by your physical and mental constraints.
So yes, it's important to keep in mind that everyone's different but there is definitely excellent insight into how people work together effectively in large groups.
Every place were money is involved longterm becomes a ecosystem, with prey, preyed-upon, parasites and a balancing ecology, reducing the possible effectiveness.
A companys maximal performance is limited by this internal eco-system and its external eco-system. There can be short term gains as the system spins itself appart, but there is a peak antelop even for the most well adapted lion.
Intuitively, in smaller organizations these bottlenecks are fewer, and in an organization of 1, your individual capacity is only limited by your physical and mental constraints.
So yes, it's important to keep in mind that everyone's different but there is definitely excellent insight into how people work together effectively in large groups.