Until the AIs are running entire companies unattended, then at some point, some human has to transfer some instructions into some actionable representation than the agents can build. That human might one day be a manager rather than a developer, but that transfer of intent is always going to be the problem to solve.

And IMHO while humans are still in charge of these processes, the way that most people can best design and explain what they want is via conversation, exploration, iteration, etc. Not by a single fire-and-forget prompt!