With a Head up display ( way the CAT3 manual approches are flown), the flying is very precise, much more precise than a flight director one.
The successful landing is achived when from dh to touchdown, the aircraft stays within the landing parameters.
CAT3 autopilots are unbeatable at this game, a large transport aircraft (boeing or Airbus) for example, would change its crab angle if the wind shifts during the descent, without anyone feeling it, it would decrab, flare and brake by itself. There is no problems since most of the time in LVPs you have to vacate towards the end of the runway. Then the fun begins to find your way to the gate...
But if maually flown, your minimas are 50ft.....this is quite high , just the beginning of the landing phase ( per certification); proper training and practice would make all these landings a perfect 10. A lot of airlines are using it everyday (almost) and it works. Again, ones have to remember that you fly these approches as 2 crews, increasing tenfolds your awareness and success rate.
at the end of the day, you are doing what you can do with the piece of kit you do operate, your company authorisations and what your Sop's dictates... this is what a professionnal pilot does ...