No what it says is that major artists tend to make their startling observations from some pretty startling points of view.

It's just an observation, founded on fact. those of us who stand in awe of artists like auden , ezra pound, woody guthrie, oscar wilde, james joyce, ts eliot, mozart, js bach, etc. we don't necessarilly share these viewpoints, but we realise that the vision these doctrines gave them was part of the magic.