So overall I don't think Bryan is wrong, per se, to take the tack he does within the pool he plays in; it's just a pool for type-A personalities (in the system dev domain), and not the right place to play in if you're starting out, or are otherwise fragile. Build up your skin and chops in smaller ponds first. Stay out of them if you don't feel comfortable swimming there, because the discomfort of competition actually serves a purpose for those swimmers.
(Yes, some people can pursue and sustain excellence without the heat of competition. But not everyone is like that.)
Sounds like an argument for pluralism, not for "one size fits all".
I can't imagine how collaborators on a single codebase could self-select into different groups with different communication styles. By Conway's Law, the codebase would have to be restructured and factored into parts that the groups could work on in relative isolation. This is a big architectural obligation to incur for the sake of preserving some casual braggadocio or competitive inconsiderateness.