I'm not convinced of this bit: "it revealed three things as the real bottlenecks (1) deciding and specifying what to build, (2) verifying and being accountable for what is delivered, and (3) the deep human understanding — of the codebase, the business, and the environment — required to carry out both of these."

It could be that because coding was seen as expensive and a bottleneck, much effort (both upstream and downstream) had been going into making sure its input is correct and the output need not be discarded. If coding is seen as a quick and cheap step, its output could stand to be thrown away and therefore the same amount of oversight may not be needed upstream?