They have to give so much thought and attention to the low-level mechanics of dribbling or fingering the keys or reading the music, that they are unable to give any thought to the thing that matters.
他们对顿音演奏、指法或读谱给予过多的思考和关注，以致于他们无法对重要的事物进行任何思考。
2
They are open to the tactical possibilities and the musical challenges precisely because they are freed, through skill, from the need to pay attention to the low-level details of how to play.