There's a guy in Australia who made some "history" book called the "Dark Emu’ that pushes the idea that Aboriginal Australians were not just hunter gatherers and that they had settlements , agriculture, aquaculture and food storage. His own self proclaimed motivation for writing this fake history is to "rebut the colonial myths that have worked to justify dispossession"
Just to give you an idea of how ridiculous this claim is that the Aboriginals had these type of advanced settlements. The Australian government once had to release a PSA video telling the Aboriginals not to sleep on the road or they might get run over by cars. Does this sound like the kind of people that would have had agriculture, aquaculture and food storage?
As you can expect though, this book got a lot of awards and gets promoted in libraries and schools
I wasn't saying otherwise. You shouldn't teach wrongly, at least not in the long term (a one lecture long example can be effective). But that a fundamental to learning to being forced to confront your own bias, whether that's political or instinctual and then know why you thought it and how it made you wrong. Which means a lot of time letting someone be wrong for a period to make their fall from grace that much more strongly resonating.
For an example, during our Major Research Project semester we were basically given a short intro and then allowed to write survey related to our project. Which then was followed by a month of tearing into them by the professor about how leading and biased they were in specific ways that most people didn't even think about and wouldn't have without being shown a specific example of themselves doing it wrong. I can say for certain it helped me considerably in thinking about how research is conducted and why it is so, which is why I sperg out at so many "studies" that get posted around here, whether I agree with them or not.
Either way, the point isn't that "one bad course" is entirely a good thing. Only that there has to be some balance to give the necessary time and learning from bad experiences the ability to root if we want to actually educate people.
Otherwise we get Degree Mills like DeVry that just rush you through as fast as possible which technically gets you the necessary information but doesn't really accomplish anything.