> true mastery is to let your humanity at the door and pull up a facade

Or say "screw that" and go find work that lets you be a human, not a repressed shell. I'm in my 40s now and have followed that my whole life to great benefit. Barring about two months in a open-plan hell hole in my mid twenties which I still look back on and shudder, mostly out of empathy for people who spend their whole working lives that way.