What are the dire consequences for not being in control? None, except that your efforts may please you personally, but they will not hang in a gallery or museum. Great works of art are not done by accident. They are created by disciplined minds, driven, passionate, fanatical, sometimes the insane.
Mozart was a genius, but he was also an obnoxious jerk as he was portrayed in the movie, "Amadeus." Yet when it came time to compose, the movie showed him as serious, engrossed in his work. My understanding is that he never erased, or crossed out anything, but his manuscripts were flawless, no corrections, no changes. His music, the notes all flowed from his head onto the paper, whether he was writing a full blown symphony, or a piano concerto.
Beethoven was another genius who wrote most of his works stone deaf! Even his great Ode To Joy, he never ever heard a single note played by an instrument. Yet he was able to hear, listen to ever nuance of sound of each instrument in his mind's ear and coordinate them all into a symphony. Does that not take discipline? Do such great works come about by accident, in a trance? No they do not.
Grand Ma Moses was a great artist. So was Georgia O'Keef. She is one of my favorite painters, with a sense of perspective that is photographic. A very intense worker who hated to be disturbed when painting. Does such dedication not require discipline?
Ever read Van Gogh's biography? Very interesting reading. So is AA's. Most great artists have one thing in common, they work hard as if their life depended on it. When they set out to produce a work in what ever their chosen medium, they slaved until it is exactly the way they wanted it to be.
Try doing that while in a trance.