The art of reduction. The art of discernment. A study of repeat medallists asked ‘what to stop doing for the next event’. Repeat medallists owned 80% of the stops but were less than 5% of the population! No-ing requires years of experience and knowing.
The expert performer has learned the importance of no. They do not layer everything into a performance only what matters. The art of reduction is their learned skill learned early. The decision making muscle in the expert performer.
How effective is 'know means no' in your world?