[watwut]

Technical manager needs to defer decisions too. No amount of knowledge makes it good idea to micromanage or not to build consensus with those he manages.

However, he still have better ability in deciding who to defer/trust to, better sense on bullshit vs reality, better idea about nuances of decisions and knows words people use. That shows up in how meetings are moderated, people know it and also some will always try to game the manager. Non technical manager is reduced to parroting sentences and attitudes he does not understand fully. Knowing something is not a disadvantage, ever. Not knowing something is.

Every manager needs to make some decisions too. And in there, knowledge helps. Knowledge that slipped away is better then no knowledge and worst then relevant knowledge.