There are two kinds of bags: carry-on and lost. I first read the above quote on a site dedicated to techniques on packing only one bag per person on a trip of any length - and it’s been a mantra ever since. So much easier to skip baggage claim and walk out of the airport. I still put an AirTag in the carry-on - helps in case it gets stolen at the hotel/etc.
I’d be interested in that guide if you could find it.
There used to be a horizontally formatted PDF one page printable version of the guide but I can’t find it at the moment.
There's also a how-to-pack portion of the guide as well re: bundle wrapping.