Not using Agile reduces cognitive load perhaps too. When i've seen agile in use, it's because incapable managers lack the insight or trust to let teams surface

Not using Agile reduces cognitive load perhaps too. When i've seen agile in use, it's because incapable managers lack the insight or trust to let teams surface valuable work through emergent properties of what they're working on, so they, in politburo fashion, try controlling things, which just lessens the attention spent on work.