I shall weigh in here. I am a classicaly taught musician married to a self taught musician. I bring the fundamentals to the table and he brings in the creativity. I think you really can benefit from a mix of both. For instance no matter how many great ideas you come up with, if you plan on playing with someone else you need to be able to convey to them what you are doing. If you can read sheet music it makes it alot easier and you have so many more opportunities. But one cannot live on knowledge alone. You can learn all the scales you want and still suck. It's how you play not what you play.
As far as art goes, I took every art class offered in highschool. They taught me skills...the correct way to fire clay....painting techniques...shading and rendering skills. I did not learn how to be creative though.
Now I am an Interior Designer. That is my art. I went to school for it, but you can't really learn much about the creative aspect of design there. That's the part you either got or don't. But without schooling I would not know all of the fundamentals of the industry that are neccasary to survive in the field.
THat's it
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