I think this relates to the quality of practice. I certainly agree that low quality practice can turn you into a machine, but high quality practice does not necessarily do so. While certain activities do require repetition - for example, specific shots in tennis or particular combinations of moves in fighting games, you can also practice being dynamic (for example, by playing against other players and working on being more dynamic).
You bring up an important distinction - it is best to practice in a way which helps you to build up the proper skills for your activity in order to be able to apply them with earned experience. Thank you for pointing it out!
RE: Splinterlands Economics: The 10,000 Hour Rule