Some of the most high achieving people are extremely "unproductive" 80% of the time. Optimizing for efficiency at all times ≠ high achieving.

Is being busy part of your identity?

"You can do anything, but not everything." - David Allen.

Designing a life that enables flow state means working on things out of intrinsic motivation, making space for rejuvenation, and working on hard things in the short term for long term benefit.

"To be is to do." - Socrates. Balance your doing with being; your achievements with your existence.