for the sake of 50 flights per year which divert due vis. (ASA figures apparently) A bit like amputating the foot for the sake of an ingrown toenail imo.
Except that those 50 are not averaged over 365 days usually when it's bad it's really bad with whole days of flying cancelled. For a so-called tourist town the airport is a disgrace in terms of infrastructure, no aerobridges no approach lighting, no HIRL, no ILS.
If you want tourism people have to be able to get there 365 days a year.
In simple terms a ILS with HIRL/HIALs will solve all the problems associated with getting into OOL as there is usually not a problem with getting out of the cloud.
The whole thing is so typically Australian, we procrastinate for ten years making a whole host of excuses of why a basic ILS cannot be built in large city airport, then just watch as soon as there is an accident they'll put up an ILS in a few weeks. Nothing like a reactionary culture.
Hopefully if they do build it it will come with HIAL/HIRL otherwise it's no going to solve the problem.