We do catch some errors, too
I should also point out that I love the point made in the Post's change to its corrections policy. Corrections will no longer include blame, such as "due to an editing error" or "based on a reporting mistake."
Some reporters were pissed because they didn't want someone thinking a copy editor's mistake was the reporter's fault.
But the Post's executive editor, Len Downie, said tough, "pointing out that editors who often catch reporter mistakes are never given public credit, so should not have blame attributed to them in such a public way."
I think most editors would be glad to take the public blame for their errors if they got equal time for each error they prevented. (Of course, I'd never espouse such a policy. But it sure is fun to think about sometimes.)