Unless you are physically speaking to someone in person, then there is always a middleman.
(Your ISP classifies as a middle man as well...)
It is illegal to compete with USPS to deliver letters.
so put mail in boxes?
I mean, there's DHL, Fedex, and others...
* excepting a point-to-point courier service for some reason
Domains can be stolen, deprecated or simply restricted from your use.
No, a town owns an address and rents it to you. If something goes wrong with the billing you get evicted, if they want a mall they forcibly "buy" it from you.
There's no resource you can count on in this way. Resources get reallocated at some point.