it actually exists to guarantee service of court documents and government records. Without it the courts and government couldn't function properly. it's so vital that the USPS has their own police force that punishes mail crime. Once I got a piece of mail about a postal worker who stole a $20 gift card in route to me. She got sentenced to several years in jail. I'd sooner screw with the IRS than the postal service.

How narrow-sighted can you be?! The USPS is the latest incarnation in a lineage of postal services that go back centuries and that for many generations served as a neutral, transparent, reliable, and capillary means of allowing epistolary contact between individuals.

Note: I’m not American, I’m not in the USA, but this applies to most postal services worldwide.