So what if I just decided of my own accord to use ChatGPT and train it myself? Or someone on GitHub made a fully trained version of it available in a Docker container, for free?

Then nobody would issue legal threats to you for selling "Robot Lawyer" services. But you probably wouldn't get permission to use Google Glass in the courtroom either, so you'd have to commit your legal arguments to memory as well as hoping the AI hadn't ingested too much "freeman of the land" nonsense...

What's the difference between self representation and practicing law without a license - is there an exemption for unlicensed practitioners when they are performing on their own behalf, or this is a distinct category somehow?