I suppose the "best manager" in this sense protects his/her team from the upper echelon politics, and, being clueless, does not bother meddling with technical decisions, letting the team do their work. Their worldview is captured in the famous quotation: «You can domesticate programmers the way beekeepers tame bees. You can't exactly communicate with them, but you can get them to swarm in one place and when they're not looking, you can carry off the honey.»