Please point to at least one item available online which exemplifies that which you think I'm ignoring or missing.

Here are the four exhibits I saw last time I went to SFMOMA:

http://www.sfmoma.org/exhibitions/232 http://www.sfmoma.org/exhibitions/266 http://www.sfmoma.org/exhibitions/264 http://www.sfmoma.org/exhibitions/292

All of them "delight the untrained senses of a mere novice" (not so much on a computer screen--these are large and/or detailed works). None of them was there because "sophisticated critics praised their rule-breaking."

Those exhibitions are gone, but if you go down to SFMOMA and see whatever's on now, I'm confident the same will be true.