I agree that changing a name wouldn't change a song, image etc. The experience of viewing or listening would presumably be the same. So, yes, names can be mere placeholders. OTOT, my gut feeling is that they can be something more. Unless you live in a gallery, you experience images mostly as memories of viewing them. Perhaps the 'right' name adds to the way the thing is imprinted in your consciousness - beyond just being easier to remember. It may depend on whether you're more visually as opposed to verbally oriented. It's like how 'autumn' doesn't 'feel' the same as 'fall.' The more I try to explain it, the more elusive it becomes - which may mean its rubbish or that it's a very subtle effect :-)

"Democracy is a pathetic belief in the collective wisdom of individual ignorance." - H. L. Mencken