How is "without being able to really put it in words" a mark of experience? Surely an engineer should be able to justify why an architecture should be arranged the way it is!
Pretty much every area of knowledge is full of those. That's why people publish books, that's why people go to college or get PhDs, that's why people with experience gets hired.
But the master knowing when to break the rules because of tacit knowledge without being able to explain it is a real effect