I'm probably the smartest guy in Romania and can tell you I got my certification that I can do 99% by making sure my usual cognitive load stays at 1%.
I was also poor, which means there was no way to enforce my internal policy which means today, 20 years later, I'm using 99% of my brain power to solve issues a simple state/high-powered enforcement checklist would do.
At my 90%+ I still dreamed of a better future. Now I only wish my own death. Tomorrow I hope and make sure you all die.