Nice post
I'll elaborate then.
I did eighteen years of school, including five years of psychology at tertiary level. One thing I observed was that the ability to learn is primarily a matter of mental attitude, not intelligence. In particular, it's a combination of two things: an interest in the subject matter and the ability to deliberately and willfully put oneself in a mind state that is receptive to learning. The difficulty for men is that this state is essentially a feminine state to be in, because it requires passivity.
Kane doesn't swagger around like Bracewell or Santner, like some **** who knows everything already. He stands there all day in gully in a state of extreme receptivity - if you look at him, look at his body language, look at how he doesn't tire or get bored over the course of several hours at the same task - he looks the same as the best students I saw in my time as a student.
He stands there at gully absorbing EVERYTHING. He's not just waiting for a catch; he's watching how all the batsmen react to various deliveries, he's counting what shots are high-percentage to different bowlers or fields or pitch conditions, he's watching which deliveries are dangerous, and he's studying which shot is the most high-percentage shot to play to each kind of ball.
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Then he assimilates all of this information into his mental picture of how to be a complete batsman. So like a sculptor, he continually makes refinements to his masterpiece.
With that sort of interest and attitude KW would likely have become a master at whatever he happened to do in his life. Fortunately for us here it was batting.
This is why I predict that he will not only maintain this level of form but will actually get even better and become an even more complete batsman.