Isn't the bottom line (not sure where that expression comes from)simply this; someone makes music, it either does something for you or it doesn't? I am prepared to accept some kind of scale from nothing, through not much, to quite a bit to ...... pick your own final state, and that what you feel may touch a range of human emotions. All other judgements about technical skill and shared values are secondary to what it does for you when you hear it?

Generally the whistles does more for me than the recorder, but that's for me. What it does for others will generally not change how it affects me, I think.