I strongly disagree, and let’s just ignore the fact that we’re in a pandemic and going inside a PO means you can wait anywhere from 5 to 45 minutes in a closed space with a handful or herd of impatient customers just to talk to someone, who is going to make you wait so they can serve the people in line behind you. You’re obviously applying your anecdotal experience with calling some outfit, and being put in voicemail hell or left on hold until doomsday. Ever called your local PO? Didn’t think so. The people working at your PO are your neighbors. They’re not at all like Amazon or Apple employees, and nothing like those working at the electric utility. They’re simply neither overly sophisticated nor narcissistic. They have a good job, and they’re happy, and happy to help. You call, someone picks up the phone, it isn’t going to just be anyone, it won’t be a receptionist, but the position that is responsible for the phone, which is sort of a multidisciplinary position that works directly for your Post Master. You explain the situation, and might sit on hold 2 minutes while they track the package. They’ll take your name and number, and they will call you back after a rather rapid preliminary investigation. They’ll explain the situation and what is going to happen. If the package was misdelivered, it might take a few days for your actual mail carrier, or the person that answered the phone, to recover it and redeliver it to you. This is all assuming you neither live in an area that has a PO with one employee, the Post Master, nor somewhere as population dense as a large city.
But by all means, use your best judgement and do what you think is best.