In a way this commercializes art which partially necessary but may not be health if exhibitions are dependent on market forces or sale of paintings.
It would make exhibits sustainable and interesting as well if workshops by known artist will be conducted along with the exhibits to engage the audience in several ways. First by letting them see the creative process of painting, by letting them experience the joy of painting through the workshop that would eventually draw larger audience. Source of revenue to sustain the exhibit is two-fold, first is on the sale of the art work and second the proceeds of the workshops.
Art is not just a means to express our creative self and to heighten our aesthetic sensibility but also an effective social commentary. Presenting diversity is a wonderful theme in art narratives but limiting it to race is somewhat lacking because race is just a portion of diversity. I think it would be wonderful to include gender, diversity of perspectives and even diversity in style.
A same subject probably can be rendered in diverse method and perspective. For example, the same portrait can be rendered through impressionism, classical, bistre and alla prima method giving the audience not only the narrative of the subject but also the breadth and narrative of how can it be rendered. Interpretation can also be expanded say for example, from a feminist point of view, racial point of view etch. This would provide audience different experience and perspective with the same subject and sort of educating them that there are a lot of ways to look at