Well, the information the image provides would be lost, I suppose. However, generally people aren't suggesting we don't include the images at all, but merely include them as links, so it would seem to be impossible for any information to be lost---exactly the same information will be present, just navigable in a different manner. Sort of like how old-style books that had figure plates instead of inline figures (due to the printing methods used) did not have less information, merely information in a different order.
What information does the immage provide that cannot already be found in the article?