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Great post.
.............
Speaking as an infielder wannabe myself, playing around the diamond in slo-pitch :- ) I would say that the "light bulb" here is .... simply that infield is infield. The four guys are all just in a semicircle out there, stopping groundballs.
Ackley's another example. He was fine at first, was quick, so could play second. The differences between IF spots aren't as big as non-players make them.
The principle isn't an absolute, but it's one to be aware of. Some guys can pick a hot-shot one hopper, and some can't.