Agree that for a while at least it seems you'll need to understand the domain it is helping you with. That said, with the improvements in GPT4 over 3 in such a short time, and with plugins, I would be surprised if it takes any longer than a couple of years to be much much better at this to the point it is correct most of the time. You will probably still need domain knowledge at that point, not quite sure if that will last either.