I think you're missing the OP's point. He isn't suggesting ending postal service, but coming up with new and better services instead of trying to scare people away from email.

For many people, the post office is just an incredibly slow, junk mail delivery system. If you care about the USPS, I'm surprised you don't agree with the OP that new ideas are needed.

(One idea i'd like to see is a registered email service, so you know an email was received. The post office has the public's trust to pull this off.)