Theft of postal packages in the United States

There's a really mind-boggling practice in many parts of the United States with regards to postal services and package delivery: The delivery truck will bring a package to a home, and if there's nobody home, the delivery person simply leaves the package at the front porch. Yes, for anybody to steal. In fact, from what I have seen in some videos, many times the delivery guy doesn't even try to see if there's anybody home, and simply leaves the package at the front porch without checking. Just for somebody to come and steal it. And this is a real epidemic in many parts of the United States.

This is completely incomprehensible to me. To me this sounds like it should be outright and blatantly illegal. This is the postal office, or delivery service, engaging in criminal neglect when it comes to other people's private property. You can't just be tasked to deliver someone's property and then simply leave it in the open, unattended, for anybody to steal. Or at least you shouldn't be able to, in a rational society. Opening other people's mail is highly illegal. Allowing other people's mail to be freely stolen, without any supervision, should be likewise.

Here if the recipient is not at home, and there is no way to securely leave the package, the postal worker leaves a note in the mailbox saying that the delivery can be retrieved from the postal office. It's not just left there for anybody to take it. That would be complete madness.