My experience with ChatGPT writing is that, if I have some essentially boilerplate to put down on page and work from, it's "fine" so long as I know enough to cross out the stuff I don't like and expand on the parts I do. Saves some time. But if I ask it to analyze a more complicated/nuanced question, it's far less useful. It certainly doesn't come up with unique insights into complicated topics I have a lot of familiarity with so far as I've experienced.