The Chandler wobble is interesting, because it was calculated around the time that it was discovered that it should stop within 68 years of starting, if no force was acting on the Earth to cause the wobble. No one knew what that force was, but there were a number of theories. Mantle activity was one theory of how it persisted. The current theory seems to be that it’s caused by fluctuating pressure on the bottom of the ocean.
For some reason, some of them like to predict some sort of polar shift in Earth’s future. The Chandler wobble produces (very small) pole shifts, and was caused by an unknown force, so who knew that it couldn’t cause a large, cataclysmic polar shift? There are some things in ancient myths that could be interpreted as referring to a large polar shift. It’s probably more fun and interesting to predict a terrible future cataclysm than to predict that life will pretty much go on as it has.