Domain expertise

“An expert is someone who has made all the mistakes that can be made in a very narrow field.”

A physicist in a hospital meeting. A jazz pianist writing code at midnight. A veteran CEO joining a nonprofit board. They’re brilliant—yet suddenly clumsy. Why does expertise vanish when the domain shifts?

Twelve thousand hours of training turn a medical student into a safe physician—yet that same person may feel lost running a small clinic’s budget spreadsheet. A legendary CTO stumbles when asked to pitch to non‑technical investors. A top product manager moves into climate policy and discovers their instincts misfire. The pattern isn’t lack of talent; it’s that their finely tuned skills were calibrated for different rules, tools, and feedback loops.