Google asks these rights for the purpose of using the Docs service; they won't claim ownership of things you create or publish your private documents to the world. It's a licence, not an ownership transfer.
More on ToS, though, Google policy is to allow not even the user access to documents deemed against the Terms of Service, and usually the identification of such documents is done through an automated algorithm that sometimes wrongly detects breaches. In the case of phishers, they can't get access to information they have wrongfully collected. In the case of an innocent user, they can't access their own work. There is an appeal process in place and private documents are not checked for Terms of Service.