Anybody with a grain of flying knowledge knows that with all the 'aids' in the world a 400 ft airfield in a fog prone location can be unreliable and also uncertain for schedules.
Hmm, I'm not sure I share your sentiment here.
1) Popping out the bottom of an LPV approach, at a controlled airport with fire cover at 200-250ft, to a high intensity runway lit environment in an RVR of 750m (500m met vis)
VS
2) Popping out the bottom of a PinS approach to no lights and a 1500m vis, to proceed VFR with no further aids to a heliport in unprotected airspace with basic fire cover?
I know which I'd rather fly, but isn't the more relevant consideration that the airport can also operate to much lower met visibilities?