In one word - unpredictability.
Countries where bad weather is guaranteed enjoy the luxury of proper preparations and populations who grow up with winter as an accepted part of life, so they simply get on with it.
Our weather cannot be guaranteed, so it is not financially feasible to invest in expensive equipment which may sit idle for four winters out of ten.
So we have occasional freak snow storms that arrive with little warning - it's difficult to predict weather changes accurately over a small island like ours.
Culturally, we act as though snow in winter is completely unexpected.
Our fragile road systems clog instantly, our drivers, many of whom have not driven in snow before, slip and slide all over the place and crash into each other causing mayhem.
Our news services act like snow is an invasion from Mars, and send reporters to stand in it and report it live on news programmes like it is a unique event.
These are just some of the reasons why everyone treats the first show of winter like it is something of which they have no comprehension - like today.