To much illumination and things get very hard to see. This photo, of some glass hung in a window, is a tad over-exposed, and forms of the glass bottles are barely discernible against the backdrop of a bright day. I think this happens with people also. An artists works are a brightness against which it is difficult to really see the flesh and bone, foibles and fragility. The works are larger than the artist. For instanse Wagner's operas are larger than his personal prejudice. Then again, a given artwork may mean something completely different to each viewer, and something else entirely to the artist...