So in other words, humans also have zero real understanding.
Example of a question a typical human idiot can solve without ever getting it wrong, but ChatGPT can't reliably: Is 7 dollars enough to buy a thing costing 7 dollars? ChatGPT can usually solve this, but it sometimes gets it wrong, getting that sort of thing wrong ever means that it doesn't understand, it just uses dumb statistics.
Edit: I'm not saying it is impossible to make AI models that understand these things, just that the ones we have today don't.
https://i.imgur.com/im9EquK.png
Perhaps it's magic trick that a language model can do math, but it's quite impressive that it gets very close to the desired answer.