Many (most?) large airlines take cargo directly like this. It's not so much "check your bag and don't board" as it is "consign this cargo shipment" which happen

Many (most?) large airlines take cargo directly like this. It's not so much "check your bag and don't board" as it is "consign this cargo shipment" which happens to be taken on the same aircraft as passengers and their luggage. Unlike checked luggage you need to declare the contents of the packages etc., and presumably there is security screening.