How iTunes Changed the Way Customers Purchase Musics

The Telegraph published an interesting article one how itunes has changed the way customers consider music a,d purchase accordingly tracks or complete albums. In summary, iTunes users mostly buy single songs from temporarily popular bands than the complete album, so they should be consider more like bees moving from one track to another, rather than collectors acquiring the complete album containing the current music hit.
This is the reason why AC/DC refused to have its album available on iTunes as they did not want to give customers/fans the choice of purchasing only couple of songs... Indeed, the famous music band consider this album as an entire piece of art, so taking one song out of its entire context would be meaningless. Other majors or bands are using similar arguments to refuse offering new albums on iTunes, as it would "kill the album" by selling it into pieces...
Without considering Apple business plan, let's simply look at this story on the customer's side. If some artist have such a high consideration of their work or albums, so why would then agree to have their past hits summed up in some "Best of" compilation released by their Majors to generate cash flow for almost no investment? By definition, they also break the magic of the entire album by offering such hit selection!? So, their arguments is just meaningless, and mostly biased by a financial perspective of selling an entire album to customers who will mostly buy it for one or two songs... Is it what is called having respect for music fans? For sure, bands not having signed with a Majors, and directly dealing with iTunes might have a completely deferent point of view, but of course, they do not have the same exposure to news networks than AC/DC, unfortunate as they could also have interesting comments to deliver to their public.