Yes, ideally everyone should check every e.g. Wikipedia citation before relying on it, but obviously most people don't.

In the past, the only way to come across completely made up court citations regarding obscure bankruptcy procedures would've been that somebody intentionally made them up, probably maliciously.

Given how unlikely that is, if you didn't understand that GPT just makes up text that resembles what you want to see, I'd understand trusting it as you would a search engine.

It's not like lawyers are visiting court clerk's office to verify every case they find in some online database.