For many years recovering the remains from sites such as these was not possible, too expensive, there were other more pressing issues... and so on. Now that the facilities are available and there is a request from the families to do so, the recovery becomes an option. The councilor mentions in the press release that they have weighed the options and decided to grant this request. There is a national fund to cover the costs of operations like these.
Chances are that over time war graves such as these will end up being disturbed in some way, by fishing operations, civil engineering projects or other circumstances, that risk is always around. Or they will have to be recovered because they are in the way of specific plans, as happened a few years back with a Wellington wreck in the IJsselmeer. Because of this, a recovery operation while there's still a family around and there's the willingness for a proper send off is not the worst outcome.