Adam, did you even read the discussion about the Answers in Genesis article?
The whole point is that those five word replacements are all that is needed to turn it from an argument against a flat earth into an argument against a young earth.
If that doesn’t show just how identical young earthism is to flat earthism, then quite frankly I don’t know what does. There is no chasm whatsoever between them, neither scientifically nor Biblically. They are both as completely divorced from reality and as completely divorced from an honest and informed understanding of Scripture as each other.