Many years ago a QF flight got caught in the same unforecast fog conditions. New Captain was preparing to ditch until a more experienced D/H Capt suggested this an ILS AutoLand App and descent to land on a RWY, albeit below minima, was a wiser decision making choice.
Ahhh there it is. Been waiting for it. Will this myth never die??
Of course some airlines seem to ignore the fact that the visibility is below landing minima at Perth and land anyway. Which prompted a rather cryptic notam being published last year reminding everyone that Perth does not have low vis ILS procedures.