Listen to yourself. That's what management is supposed to do: manage people -- including other managers. You can't both accept and deny responsibility in the same breath.
If you truly believe that, then this is cognitive dissonance in it's highest form.
There's what you imagine and what you can see with your own eyes in reality.
Amazon, with its billions and hoards of smart people, still ended up in a situation where they find themselves in excess of 14,000 employees.
It means that there's no simple formula and perhaps once in a while, orgs just need to clear the slate and see where the pain points are and build up once again.
If you truly believe that, then this is cognitive dissonance in it's highest form.