I understand such simplistic nonsense passes for knowledge and understanding with some people. As to being too complex, its rather far too simple an explanation to have any relevance on current conditions and trends, nor on how we as a global civilization respond to the rapidly changing conditions.
"Rapidly changing?" How about this for a change. In just over 100 years most of Europe and Asia went from a warm and gentle climate with almost year round growing seasons, to crop failure, having to rush to get in a single crop before winter set in, and glaciers once again growing and moving across the landscape. Because that is how long you have between the end of the Medieval Warm Period and the start of the Little Ice Age. It is just that the alarmists do not want to admit that such things are common on the planet. They want it all to behave perfectly (not unlike their fantasies of a "Socialist Government"), and do not want to admit that unlike their fantasies, things in nature just do not work that way.