When Shakespeare was writing, he wasn't writing for stuff to lie on the page; it was supposed to get up and move around.
The whole essence of good drawing - and of good thinking, perhaps - is to work a subject down to the simplest form possible and still have it believable for what it is meant to be.
With the question of the effect of a poem, the topic of investigation shifts from that of textual autonomy to textual reception - to the issue of what we actually look for or find in reading a poem.