The Hezekiah gag works because it sounds just so darned natural as an OT book. I never fell for it because I learned in school what Abraham Lincoln once said: “Never believe everything you read on the internet, especially when it comes to the Bible.”
Mark Twain had a corollary:
It’s easier to fool people than to convince them that they have been fooled.
I have a slightly different take on it:
It’s easier to fool people than to get them to admit that they have been fooled.