Why do artists present faceless art? The quick answer seems to be that that viewer quickly ignores the absence of the face and looks for beauty elsewhere.
Art can have its own voice: an active or a passive voice. The difference in voice with language is determined by subject of sentence. If it performs the action it is active and if it receives the action, then it is passive.
Faceless art changes the subject. The energy and focus of the image take from the face and focuses it on the body, changing he dialogue. The body, cloths, surrounding, colors, and textures are left alone to project their own raw emotion.
Leonardo da Vinci said that “Art was art”, adding that, "We don't inform art, that art informs us". The message that art brings may be more exact if the art has a face compared to one that is faceless leaving us to find what the face might be.