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What WAR doesn't seem to capture is that hitting is the most rare and difficult skill. It's much easier to find an adequate fielder than an adequate batter. The minor leagues are filled with them.
Maybe elite pitching is more rare than elite hitting, but then you need at least twice as many batters as pitchers, so there's less demand for it. But the antiquated saying, that putting a round bat on a round ball at 100mph is the hardest thing in sports to do... that appreciation is lost looking at the numbers. And that's the skill that directly changes the scoreboard.