Great point, and I think it relates to the market need for a "full-stack developer", an all-around generalist who understands (more or less) the entire stack and areas of endeavor.

It also made me think how, typically, the problem with "design by committee" is that it's often a mere collection of specialists, without the necessary generalists (those with an understanding of architectural coherence, system-level thinking) with the power to tie it all together.

I think the reason why many great software projects are created by an individual or a small team, is that coherence and consistent vision across the system.