This is what gets me... Even at companies with relatively small engineering teams compared to company size, actually getting coherent requirements and buy-in from every stakeholder on a single direction was enough work that we didn't really struggle with getting things done.

Sure, there was some lead, but not nearly enough to 2x the team's productivity, let alone 10x.

Even when presented with something, there was still lead time turning that into something actually actionable as edge cases were sussed out.