There is a quote from the
Arabian Nights, the content of which I here lay down accurately, though not verbatim:
For some, music is medicine, for some it is a fan, and for others it is food.
___Medicine: to alter or further enhance the listener's mood(s).
___Fan: a pleasant-sounding disturbance of the air, thought of about as much as one would think of the breeze from a fan.
___Food: essential nutrition to sustain health and life -- this may very well include 'what you know is good for you' as a criterion above and beyond what you simply like or find tasty or pleasant
Ergo: responses to the OP are entirely dependent upon the individual and how they both perceive music and 'what they use it for.'
Me, I am a musician, that involvement and training commencing in very early childhood.
Around the house, I will put on a recording and use it more as ambiance, i.e. its nice to have it in the air of the room while doing other things,
but, whatever I put on is something with which I am already deeply familiar.
Otherwise and elsewhere, music -- of any sort, really -- has such a strength of pulling my entire attention and concentration that I truly resent the piped-in music in restaurants, shops, etc. because to me it is an inevitable distraction, and I am near to wholly unable to "turn it off" or ignore it.
If I were commuting and the driving / train / piloting the plane are wholly up to someone else, I could happily listen to music. If I am the driver, well, you do not want me driving anything if I am also listening to music. I suppose the one exception to that is a long-distance haul where it is say, on an interstate and traffic is extremely light, or next to or actually nonexistent. I can not drive a manual shift vehicle, especially, if any music is playing -- inevitably I over or under-ride a gear, because apart from feel, I depend so much upon the sound to tell me what is up.
Because that is my disposition, I somewhat marvel (not much, I 'get it') at people who can tolerate it in restaurants, and other public places where the choice of what is played is not up to me. I do think anyone driving their car in anything amounting to moderate traffic is about as much danger to their self as well as others if they are listening to music, nearly as disturbing as knowing people are reading or sending text messages from their phones while driving.
As to your thought about 'slighting the piece,' that is less the point, i.e. the piece stays the same no matter how you are listening to it, but I would rather say the listener is short-changing their self. The fact there are but a few declared music lovers who actually "just sit and listen," whether at home, or plunk themselves down in a seat in a symphony hall, which is all about attentive listening, is a mere fact. I think TC has far less of those than average, that many here do 'just listen' and nothing else. More power, and fuller pleasure, to 'em
