On the ad absurdum: They'd also go the other way. The integration with the Dutch gas fields and system in Groningen is good enough and there is at least two decades of gas left in the fields. While closed, they can be reopened within a relatively short time and there are storage fields abound there (Groningen and Drente storages account for half the Dutch supply). And since it's ad absurdum, the earthquakes do not matter.