|Sister Wendy, art critic extraordinaire. She pops up occasionally on public television.|
Another big difference between now and twenty years ago (or how things seem to me to have been twenty years ago, since I wasn't exactly aware of... much at all then) is that artists themselves have much more of a voice in the literature published about them. Most artists run their own websites, which makes it much more likely that people will actually read the Artist's Statement (as opposed to Xeroxing a few copies and scattering them about at a gallery opening). And many more, such as *ahemahem, hem... hem* myself have blogs too, where we can spew forth all sorts of ideas. Of course, just as being a critic doesn't make you an artist, being an artist doesn't make you a critic either.
While plenty of artists are both searingly articulate and artistically expressive, many other artists express themselves better through art than through words (or sometimes, tragically, better through words than art). That's why they're artists. It is simply unreasonable to expect that all artists, after creating a piece that expresses something, will then step back, examine their piece within society/the universe/the ivory tower from several different points of view, express it succinctly, and hand it in writing to the public on a silver platter. That is a separate skill, and the two need not always match. It is like a conversation, where the same idea needn't be reiterated: different but related things are uttered between people.
*You know, I would provide sources for this information but I'm going on memory here and that shit would take forever to find. But I am certain.