I have been attending a loosely structured, weekly drawing group, and I have been impressed by how genuinely nice everyone involved is. Part of it is just that they are mature people getting together to be social and they are on their best behavior in public. I also think there is a beneficial, meditative quality to drawing that makes those artists more patient and thoughtful people.
Part of it is flow. Drawing takes full mental focus to create a good product. Trying to draw without flow ends within fifteen minutes with a few squiggles on a crumpled piece of paper. Drawing with flow results in the loss of a few hours, an aching back, and a finished product of a quality that can even surprise the artist. That amount of focus pushes normal thoughts and stresses out of the mind and something that would normally be boring becomes extremely satisfying.
There’s also something to the progression of the work. Beginning with a plan, searching for a subject, analyzing the details, and then all the painstaking work of representing an image on paper develops a set of mental skills and consideration that I think are valuable in life.