It would have taken about 1 minute to put each of them into a tool like Casetext, Lexis, WL, or Bloomberg Law to determine they didn't exist.
There are a few small law firms/sole prop type guys, however, who I have crossed paths with for whom this kind of stupidity and carelessness would be on brand though.
Guess he was just in a rush and figured this would be one of the 2/10 times he files something without at least taking a look at the opinions first, and it ended up being a massive error.
I get a little annoyed at people seeing this AI, seeing how it's not absolutely perfect, and then acting like it's horrible.
I think the expression "All models are wrong but some are useful" applies very much to ChatGPT. It's a useful tool, even if it's not perfect.