Why?

[Achebe]

It always seems people are embarrassed to admit they feel anything at all when they sit down to write. To admit it if they do feel they're accomplishing something.

Interesting observation. I find that much of contemporary poetry, even the best, is great to read but easy to forget. There's too much stiff upper lip 'a poet is not a maudlin fool' thinking going on.
I recently bought 2 books of Ted Kooser's poetry. Much as a I admire his writing, at best it makes me go 'ahhhh....so beautiful', whereas when I read Dylan Thomas or Hopkins, I can feel my head spin.