I agree and think this a good shower thought, and also don’t see it as a bad thing in general.

I’ve always thought that conceptually, background music is really strange - because of course it’s Not part of the universe being shown to us (with partial exceptions like Guardians of the Galaxy) but is an added layer that only the audience experiences, and doesn’t have a real-life counterpart.
Technically I suppose the same is true for something like subtitles, but those are more directly meta (they are clearly part of the mechanism of presentation rather than being presented as part of the show like music kind of is)

But that doesn’t mean I think it shouldn’t be there (Nor do I think OP said so) - it’s just a weird thing we all accept as normal because it Does enhance the experience (usually)