Factually/financially correct but neverthless if you as PIC have to divert do you go somewhere perhaps "offline" where you might well struggle for ground handling, let alone to find beds for 180'ish pax, or if you have the option, do you go to a mainline station where in this case at least some of the passengers had got their cars in the car park and their own homes were within driving distance.
At least by returning to destination you stand a chance of keeping some of your paying customers vaguely satisfied with at least one decision made on what might have been a pretty dire day........