"Creativity can be described as letting go of certainties"
The artist spends years learning skills and techniques and through trial and error, develops a unique language of expression. This requires devotion and many hours of work. Eventually, this language becomes beyond logic, and part of the body's intelligence. Instead of relying on this knowledge and letting go of control, many artists still try to plan, overthink and overanalyze, and as a result end up with lifeless artwork.
There are however some people that haven't spend time on developing skills and techniques of expression. However they have the ability to let go and let "accidents" happen. They often do come up with some interesting vibrant work, but unfortunately lacking integrity and consistency.
We need skills to create, but we must learn to trust that those skills will support us when we surrender to the unexpected. Only then can we really create.