We're just drawing a distinction between composing and what makes a person a Composer, with a capital C. I could psychoanalyze you but it only makes me an amateur psychologist. I could draw a house with some crayons and give it to a real architect to turn it into a real layout for a house. Doesn't make me an architect even if I did draw a really delightful house. I could come up with a rudimentary plot for a book and have someone else write it. Do I need to continue? Just doing something doesn't qualify you. If Mel Brooks could actually compose, he wouldn't need other people to finish 90% of the job.
Perhaps Paul McCartney can't read music. I doubt this is true (perhaps he doesn't read it well but he probably knows how to read it), but say he can't. He can still play an instrument. He still understands how music works and functions. By technical I mean theory. You don't necessarily have to be able to write an essay on music theory to have achieved some innate understanding of the way music works. Paul McCartney can make fully realized music.
I wasn't there when the score of The Producers was written but it's clear to me that the ghost writers account for a lot of the aspects of the songs--the key changes, the chorus-verse placement, the layering of harmonies and voices, etc... these things are composing. What constitutes good music is a matter of taste and opinion. The actual process of composing is less subjective. Mel Brooks' role in the genesis of the music is probably relatively minor, considering the work that is done even by the orchestrator.
I just don't know why we want to pat rich guys who have enough money to get other people to do things and just put their name on it on the back. I suppose like PegasusRising said, what's important is that the score is appropriate to the show and we all know who the real composer behind these things are. I'm just saying, get it right who is actually the composer... and not just the dabbler. I know we live in the age of the amateur and all but there are limits!
And yes, I suppose I would consider myself a musician.
yr ronin,
joey