In case you’re curious why they might hate the post office so much, I suspect it’s because as a government entity it has two important attributes:
A requirement for universal access
At least some constitutional protections for privacy.
When you ship UPS or FedEx, you’re giving a package to a private entity. They are only bound by the contract they make with you. If they decide to start opening every package, that’s their right. The USPS has specific laws around when it can and cannot search packages, and generally requires a warrant.
In case you’re curious why they might hate the post office so much, I suspect it’s because as a government entity it has two important attributes:
When you ship UPS or FedEx, you’re giving a package to a private entity. They are only bound by the contract they make with you. If they decide to start opening every package, that’s their right. The USPS has specific laws around when it can and cannot search packages, and generally requires a warrant.