If you'd only seen a clip on YouTube, you might be forgiven for missing the point - but even if you had seen the documentary as well and still have an opinion on it based solely on musical quality / entertainment value, I suppose that's valid - but who cares if I thought 'Do They Know It's Christmas' was cringingly awful?
There was a very moving
documentary some months ago on C4 which I think this idea was based on. It comes back to me whenever I see a young 'artist' singing like they've got all the life experience they're ever going to have, or when I hear someone described as having a world-weary drawl...