I think it is important to make a distinction between art forms.
Now I tried extending it to music. For example the 'mathematical' perfection I mentioned to Plum in a PM - that I don't get what it means for a BGM to be 'appropriate' because music - by the very nature of what it is - cannot help being larger than life. Every user slices the cake as he sees fit. Since last evening, I have the reasonable conviction that the duet between the mridangam and violin in 'I met Bach in my House' is the greatest piece of music I have ever heard. I am not at all uncomfortable about the fact that this may suggest different emotions to different listeners. Each may appreciate it for different memories of emotions and associations (akin to your point of 'our whole life rallies behind us at the moment at which we consume a piece of art'). I know for certain that IR and his musicians - know nothing about 'how' I am going to like it. I am not at all fluttered by this.
I suppose some musical(ly nuanced listeners) appreciates the mathematical perfection in the song, will he be itching to know if IR achieved it consciously or not. (After all, as Poisson once said: music is the pleasure the human mind gets out of counting without actually knowing it). If IR were to reply a la ThiruviLayAdal siVaji : summA kaththunEn (i.e. not the humility - that I guess would be beyond him and anyway irrelevant to our discussion- just the lack of consciousness of the monstrous brilliance of his creation) then would the musical be a tad heartbroken or even more baffled by the 'natural' genius. Could be either way.