That's not a given. Not only is it trivially easy to host your own email, there are a number of very positive side-effects of doing so. For instance, when I email my wife, it's just a local copy operation - no network traffic is generated, and thus nothing can be intercepted by third parties.
Further, although I have not done it yet, it appears to be only slightly more technically challenging to provide your own dialtone.
In 2013 the Internet traffic I actually do generate is much more secure than the Internet traffic I generated 20 years ago. Now I have a VPN to various endpoints around the globe. That's much better than telnet to tc.umn.edu :)
The disconnect here is that he is talking about particular consumer properties (walled gardens) that happen to exist on the Internet. It surprises me, given who the author is.