If it's a public RSS feed, then is there really a problem with what's Apple's doing? They're just using content that's publicly available content and providing it to Apple users. They're not charging for it, nor are they redistributing content that's supposed to be behind a paywall.
To me it seems the email was just to let the publishers know that Apple is using the content that's already being provided and allowing the providers to opt-out if they wish. As long as Apple isn't claiming that they created the content (and giving credit to the creators) then I don't see what the problem is.
Damn straight! Storm in a tea cup methinks.