HathiTrust does not provide access to in copyright materials to anyone. They provide research access for "non-consumptive" use through the HathiTrust Research Center.
That's not correct. First of all, all books are copyright by their authors.
Anyone can go to a partner library (there's a list on the login page of the Hathi site) and download those books as PDFs. Try it! I've done it many times.
