Mandating auto approaches when weather is below a certain point is a management method of handling a threat. Since most management types have forgotten what it is like to fly or never knew, this seems reasonable to them.
But what is the pilot to do, when he has probably never flown a full approach, if the hydraulics are degraded, or an engine is shut down, or the crosswind is at 30 knots and the Flight Manual says an auto land is not allowed? having never done it when things are benign, he/she now has to perform like a hero in difficult conditions?
OK he has done it in the sim, but when it is for real it is a different type of pressure and not easy without the familiarity of practice.