I disagree with your disagreement. You can also phrase brain surgery and movie watching as "modifying the inner thought processes of the subject", and as such

I disagree with your disagreement. You can also phrase brain surgery and movie watching as "modifying the inner thought processes of the subject", and as such there isn't a clear distinction. One is art, the other is trade. One can of course make art one's means of substinance, and one can master one's trade artfully.