The key is that it is way faster and has a broader set of knowledge than a human. Being an editor is often easier and more productive than being both a single generator and editor
ChatGPT can play an interesting role by separating duties in a process of productivity. ChatGPT can generate tons of true/false suggestions very fast and understandable by humans. Sometimes this helps a lot.
The downside is the risk of atrophying one's own mental ability to generate such suggestions if excessively relied upon. Given my druthers, I'd prefer to be a generator of text ChatGPT would want to absorb than to be a consumer of the mystery meat it is regurgitating.