I'm working in a library that was written by someone who no longer works at the company who thought this way.
It's an absolute nightmare to understand. He may have been in the "coding zone," but he chose variable names that make no sense, abstractions that don't map on to any actual entities, and left no coherent documentation.
I think the organization and communication layers are absolutely critical, and any apparent velocity tradeoff is just accumulating technical debt, because there's probably an entire team who is perpetually on the hook for supporting what you wrote, and actual long-term velocity over time depends on their ability to understand it.