The big advantage of CAT II or III against CAT I is not the actual ability to execute it. Much more important is the preflight planning advantage. If you read a forecast of Moscow in winter, you will find almost half a year conditions below CAT I. So you need 2 alternates for planning. As the alternates with better wx are at least on hour flight time away, many planes don't have the range. Especially the need of a category higher for the alternate. So if you are able CAT II your alternate is good with CAT I.... At least this helps to plan legally. If you check the planning of the planes in UUWW for legality, the ramp would not be crowded anymore
