Well, not exactly forever, there was that whole Galileo vs Catholic Church thing.
I'm gonna guess this confusion happens for the same reason as then: politics vs facts. This same thing happens where school boards what simplistic explanations for certain things they want deemphasized and politically biased yet detailed explanations for ones they want emphasized. Its annoying.
I don't have a source handy for that, so take it with a grain of salt, but it's an interesting take on the story.