Again, there is more to the music game than rappers rapping over your beats. It is possible to sit in yo mamas basement and not only make music but also make money by doing it. Industry parties and events aren't necessary at all. You're speaking based off of limited knowledge of the game and solely from a rap perspective.
You're saying that a director is a director, screenplay writer is a screenplay writer yet your are saying a producer isn't a producer. If I sell an artist a beat and his mans tell him how to spit on the track, do his adlibs and whatnot, does his mans get the production credit or do I? At the end of the day that'what it all comes down to. If you and others want to create extra responsibility or the producer then go right ahead but it all comes down to who did the beat.
Blaze can get this argument off because people are willing to listen to him due to his track record and he's from an era where nine times out of ten artist worked hand and hand with the producer. Like I said before and even Just and Mannie Fresh have also stated in the past, not every artist wants input from the producer. So if I get a track from Just and due to creative difference, chemistry, whatever we can't work together on it, does that mean he's just a beatmaker? Because Just said that when him and Em first worked together, Em wasn't trying to hear him and got offended that he even said anything to him.