Leonard Maltin — American Critic born on December 18, 1950,

Leonard Michael Maltin is an American film critic and historian, author of several mainstream books on cinema, focusing on nostalgic, celebratory narratives. He is known as a "go-to" critic for the major studios, for writing the shortest review in the U.S. and creating the Walt Disney Treasures series... (wikipedia)

A Christmas Carol is such a fool-proof story you can't louse it up.
Everyone is looking for the sure thing. They are looking to hedge their bet. They think the way to do that is to go with a proven quantity, a remake of something you have already seen. That is their mindset.
Quality survives.
If I were less than honest as a critic, I think people would spot that right away, and it would destroy my credibility.
Television is what made It's a Wonderful Life the classic it is today.