To Fergie: Sorry to do it, but Major and minor scales are 7 notes.
My answer to the OP is. You are speaking a language. A language that many Indierockers don't speak. If they don't speak the language there is no key to communicate. If you hired me for a session and said this is a 1 6 4 5 progression in A minor I would play Amin Fmaj Dmin and Emin. If you said it was a 1 6 4 5 progression in A Major I would play Amaj Fmin Dmaj and Emaj. For me, Theory is a way to condense musical ideas into a communicable form. If you can hear what you want to play in your head and play it perfectly who needs theory. If you are writing parts from other people and can figure out the parts all by ear. Awesome. If you can play a suitable part to another persons song without theory that is killer. I personally need the guide of theory.
LOL again i rest my case, over complication of a simple scale with eight notes. Complication as a word has 12 letters to spell it correctly, makes no difference how many are repeated. Major/minor scales in their application are the same.

