This has nothing to do with medical decisions, traffic or any sort of logic, it’s to do with preserving Dublin’s “skyline”.
Dublin (or any Irish city really) does not really have a skyline to protect, there’s a reason that the traditional skyline picture of Dublin is the Poolbeg chimneys, or maybe now the National Convention Center.
In fairness the ABP were doing their job - not allowing changes to a bland skyline, but this shouldn’t have been their job to do. Those clowns out at the DAA can pretty much build any old rubbish they want without involving the ABP, why the hell should something as fundamental as a children’s hospital be held up by 3 ABP staffers on purely aesthetic, chin stroking reasons.
Also I’m slightly amused that Dublin people seem to think it’s a bigger deal to travel from the M50 to city center than it is from say Listowel up to the M50.
So yeah put the hospital in an isolated IKEA type location, rather than a vibrant city center where family and friends can meet up for lunch, take breaks from the hospital, take kids on little excursions etc… Nothing more important than being just off the M50.