KTT
I cannot see the problem at all... from your post. All he did was hitch a ride in ATC's wagon... that way he got to see the depth / type of snow first hand. He was thus more informed than anybody else about the conditions.
You have not said what he did with the information he gained - just a very loose implication that because he was the only movement that day, he based that on his ride with ATC
If we follow your logic, if I am the only person to divert because of adverse weather, I am "useless" if everybody else carried on / got in. The "sheep" instinct is very dangerous - my hat goes off to him for actually using his initiative in asking for, and getting the ride.... what happened thereafter I do not know from your post