I think this is a fairly commonly touched subject that boils down to what's considered "design" and what's not.
REBOOT: What makes you think YOU'RE a sound designer?REBOOT: What makes you think YOU'RE a sound designer?
Sound design by definition implies what design implies, which is "to give form to something". Of course, if one utilizes a pre-defined form (e.g. a sound created by someone else), there cannot be design with the same kind of sense as there's with sounds that are original. What then justifies the use of the word design?
It might be practically impossible to create everything from scratch given deadlines and all, but do you think there's some line of originality that still justifies "sound design"? Or does it even matter, to whom?
The question is fairly similar to what's considered art and what isn't.