> Not only is it trivially easy to host your own email
Perhaps for you, but average Joe does not know, nor care how to do this. I've worked with "technical people" who couldn't figure out how to use PGP to encrypt emails, imagine trying to explain to random people what a VPN is.
As long as signing up with gmail stays easier than hosting your own email, nobody will ever bother - and this is the danger schneier is talking about.
Perhaps for you, but average Joe does not know, nor care how to do this. I've worked with "technical people" who couldn't figure out how to use PGP to encrypt emails, imagine trying to explain to random people what a VPN is.
As long as signing up with gmail stays easier than hosting your own email, nobody will ever bother - and this is the danger schneier is talking about.