Do poets need editors?

Kimiko Hahn talks about her experience with editors at Norton on poemsoutloud.com:

With this latest version on her desk, Jill made a radical suggestion, what I call her editorial magic really. I had arranged the poems in a fairly rigid and predictable manner: the epistolary sequence in one section, the rest in others. She suggested I take the epistolary section and fan it throughout the book, giving its themes and concerns a kind of narrative force. This editorial reordering completely changed the sequence itself—making it fuller as it absorbed the other works, rather than merely living side-by-side.