No, if they create content they are a publisher.
No matter how much you want to twist it, that is what being a publisher is. All sites, including FB and Twitter are responsible for the things they publish. They are not, and should not be, responsible for the things YOU publish. They can, of course, remove anything you publish from their site at any time they wish, it is their server, their hardware and their website YOU are publishing on.
And that does not transfer the liability from YOU to them because they did so.
Finally, removing that curation simply ensures that no site anywhere will be able to give anyone a chance to publish their content as they see fit. This is not good for people or speech. It is nonsensical revenge.