This is not poking fun at beliefs about creation – we all get to a point where we either posit something that simply is, or say something not all that different from “It’s turtles all the way down.” But those who advocate “teaching the controversy” or “teaching both sides” rarely actually want that to happen. How many people who say that kids should hear “both sides” when it comes to mainstream science (in which, in fact, however many sides there may be, young-earth creationism and other similar deceptions are not among them) would in fact stand up for equal time for a competing creation narrative, or for atheist views being shared alongside Christian ones in some context or other?
The problem with “teach the controversy” is that it is only introduced where there isn’t genuine controversy, by people who don’t actually want views opposing their own to be given “equal time.”