Or they are too darn lazy or tired to read the links or check out the sources provided. It's so much easier to watch a DVD made by some scumbag fraud who has done more to derail discussion than anyone else I can think of, other than the 'academic' who posted the link to the images of the model that he maintains were sent to him by an anonymous genealogist...
Well, “lazy” may fall into the “not paying attention” category.
It’s hard for people new to this to get up to speed, but there is no need to think that they know the score, either!