They keep going on and on with their mythological thinking. They are simply using science words and logic inappropriately applied because they are not operating in a rational worldspace. I don't mean to be rude, but I get this mental image of children finding the shoes and clothes of adults and putting them on. They are in fact wearing the same clothing, but it doesn't fit them. They aren't using them right. But in their minds, those clothes mean you're an adult and so they are in their mind, and cannot hear those who say they are not. It simply does not compute. You have to unfocus your eyes a little and imagine being inside the mind of someone who truly doesn't grasp the system of thought of someone operating in a rational worldview. The mistake is to assume they are arguing on that level, and are therefore "wrong". They are instead just using science words in a mythological framework. They aren't doing "bad science", they aren't doing science at all. Does that help?It isn't about the "value" of myth vs science as long as Ham and others keep claiming to know factual actual information about the physical world and its age, and be so horribly wrong at it.
As long as Ham denies the enormous amount of evidence showing his world view to be objectively completely wrong, he is doing science a disfavour. And Ham is claiming to know things that are scientifically testable and falsifiable. And indeed falsified.
And yet Ham and other Young Earth Creationists keep going on and on and on with their lies.