As an artist, painter, singer, songwriter, musician... and author-- I have to say that it is literally impossible to separate yourself from your artwork, music, or writing. You would have to be in a coma to not let your personal causes leak through, in some way, in your self expression of these art forms.
When I was more actively pursuing my painting and music, the best pieces normally come through when there is more feeling or something that you are wanting to share in your artwork with other people. This isn't to say that ALL of your work is like this, because I took a number of courses where they would have you bring in subject matters that pertained to the lesson at hand in the course (light and shadow studies, white studies to preserve watercolor paper that shines through as the "lights" in your painting, or subject matter that pertains to the lesson of the moment). There is a level of expertise where you just force yourself to train to become better and bust through your art lessons as if this were an exercise.
On the other side of this, you are more free to paint what you are most passionate about and to express yourself in ways that you may not express yourself, if you were totally "milk toast" on certain issues.
My writing has taken on some environmental concerns - that later moved into civil rights issues. I didn't know what I was first researching. I began writing about a chemtrail issue in my own neighborhood-- and then soon, this was backing into a number of research rabbit holes which I never would have guessed in a million years. I've been passionate to expose what I have found to the public. There are so many people who have questions about this environmental issue that I felt obligated to share my findings. I was very fortunate to have had the time, ability to research, and to connect the dots to help a number of people to understand more about these covert sciences which will effect the global environment.