Most of us have at least one email account that's already under our real name, where we have no big interest in hiding our real identity, but we do have a big interest in not being randomly shut down by Google. We hear about such shutdowns every few weeks on HN, if not more.
Google has unfathomable financial and technical resources, much of which goes to projects of speculative value at best. I can't help but feel that they could provide a slightly more customized login experience to help diverse people with diverse needs.