The brain tells the finger what to do (press 'r' to reply to email). But the brain does not walk down and presses the 'r' key itself, that would make the finge

The brain tells the finger what to do (press 'r' to reply to email). But the brain does not walk down and presses the 'r' key itself, that would make the finger redundant, and it would be a distraction for the brain. The brain also doesn't talk to the finger and tell it how to move to the 'r' key step by step, as that would be micro-management and piss the finger off. What the brain needs to do is to enthuse the finger so that the finger acts in a way the brain would have acted - the "finger as the extended brain". Now a good leader can manage to enthuse not just one finger, but 20 "fingers" - and all their transitive reports. (No wonder successful biz leaders are similar to cult/sect gurus that can seem to distort reality.)