This is why it is so important to have the mind of Christ to determine who and what have been ordained for good works that we might walk in them. You will make some mistakes. Do not let this discourage you from your God given call as an arts patron. Learn from your experiences. As time passes, and your experience base broadens, your discernment skills will increase and become more and more reliable.
Experience is a faithfully teacher.
If you are already seasoned in discernment the question is no longer if you should patronize but where, how and at what level.