Beautiful thought, thanks for posting it.
A violinest, by nature of the instrument, appears to be more closely bonded, it is as if the bow and body are growths from the person....appendaages of emotional expression.
A keyboardist has a multitude of mechanics that seperate and distance them from the actual sounding process....In the case of a pipe-organs this can be several hundred feet. (Like a carillon player the arrival of the delayed sound takes adapting to, it feels peculiar to have produced a note and hear it arrive while you are beginning to strike another key)