So what good are these tools? Do they have any value whatsoever?
Objectively, it would seem the answer is no.
It seems to me that the limitations of this particular tool make it suitable only in cases where it doesn't matter if the result is wrong and dangerous as long as it's convincing. This seems to be exclusively various forms of forgery and fraud, e.g. spam, phishing, cheating on homework, falsifying research data, lying about current events, etc.
I’m a mostly self taught hobbyist programmer, so take this with a grain of salt, but It’s also been great for giving me a small snippet of code to use as a starting point for my projects. I wouldn’t just check whatever it generates directly into version control without testing it and figuring out how it works first. It’s not a replacement for my coding skills, but an augmentation of them.