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Even Bill James argued that speed was overrated in defense (though very important). Skill and instincts are a large factor.
Eh... :- )
When he invented the concept of Defensive Efficiency Rating, he emphasized SB's and 3B's in the outfield as factors 1, 2, and 3 in teamwide DER.
.................
But ya, on the other hand, he wrote a lot about polish / attitude / character in defensive skill, notably in the infield...