I was designing a logo for a client a while back and the main concern he expressed when viewing the proof was that "my business does more than that." I had to explain to him that one of the main purposes of the logo is to brand his business by creating a consistent image.
Do the Audubon Institute's attractions have only a tiger, a butterfly and a shark?
Does iTunes feature only music?
Of course not.
A logo is meant to be simple and memorable. It should also be pleasing to the eye, but it cannot tell the entire story of a business.