as with any genre, there will be good editors and bad, and plenty who're workaday editors with little interest in your writing other than to make sure it's spelled correctly. I'm not saying find yourself a specific editor, but a good friend with a good eye, a feel for your work and for poetry in general can sometimes help by making suggestions that we're too close to our own work to see - such as dropping a particular line we are too fond of but without which the poem might work tons better. Guess it depends on where you are as a writer, and how willing you are to listen to outside suggestions. Personally, I find I can take on board other's ideas while I'm writing something (though workshopping's not a thing i often do), but once happy with what i've got down then i find it hard to change things about too close to completion. That's when time helps lend a better perspective for me. I'd be surprised if any did regularly rely on an editor to influence their work - what i really meant there was that a sympathetic editor might help make that odd suggestion that will improve your gem, whereas a poor editor won't look beyond the mechanics of anything presented them. I suppose time is a great restriction too. But a good editor is gold dust.
I've had poetry editors in the broad sense, telling me to re-write, drop poems, once in while a line or word. I think I'd blow up, explode and die if an editor was always in my ear trying to tell me about word choice and phrasing. A good poetry editor would have to be another poet, a good poet. So if another poet is revising your work, they're re-writing your work in their poetic mind. Editors in prose just need to know technique, theory; not about how to express the inexpressible.