I think it's in several ways. First, for the traveller who arrives, when the swab is taken but they don't yet have a result—they don't know if they're positive or negative—if they go home, for many of them they'll actually go through the airport or they'll take another plane. They may take an Uber home. They may take a bus. The Public Health Agency has seen that the few people who do come in who are positive have passed on the virus in the process of going home.
In contrast, with this new protocol, there's a very strict system of managing, from a public health perspective, the transportation to the nearby hotel. The hotel will be adhering to very strict public health protocols. If they are positive, the risk of transmitting while they're moving to the airport hotel is much less than if they're allowed to continue their onward journey to their home to self-isolate.
In essence, that potential for transmission has been removed as a result of this measure.