Wassup ya’ll, i have a question for usps workers

My package said it was delivered to my mail box, it wasnt (big surprise) they said they’d send the same carrier out to review all the mailboxes for my “misplaced” package and still, no luck, my question to ya’ll is, how often are packages stolen by carriers, it was a 500$ package and im sure the name of the seller company gave it away, also, do you guys always have the same routes and do you start your day from local post offices or the mothership warehouse ones? Thanks in advance