We want to move away from centralised authority and solo decision making, and the concept of chain of command.
The only time a single designated decision maker is optimal is in fast moving chaotic situations.
The “higher” somebody is, the more removed from the work, and hence the less informed and qualified they are to be making decisions.
The more important the decision, the more collaborative it should be, and the slower moving.
And the less important, the more it can be made locally by those doing the work, following policy and an Advisory Process.