The real wisdom here isn't about choosing specialization over variety—it's about recognizing that mastery emerges from something far humbler than talent or breadth: sheer, unglamorous repetition. Bruce Lee understood that the man with ten thousand iterations of one kick doesn't merely perform it *well*; he's fundamentally rewired his nervous system, muscle memory, and intuition into something approaching instinct. A surgeon who performs the same delicate procedure hundreds of times a year will catch complications a generalist might miss, not because she's memorized more techniques, but because her hands have learned to *feel* what's wrong before her conscious mind registers it. The fear Lee speaks of isn't about technique at all—it's about meeting someone who has already become their craft rather than someone who merely knows it.