I'm not saying to take the result as-is, but you could ask the AI for suggestions. A lot of authors tend to get hung up on the same words over and over which becomes tedious as a reader.
It's really not so different from a synonym dictionary. Just a lot easier and with better context.
Also, many writers don't enjoy it as such. Sometimes it's just production. Think of journalists asked at the last moment to cut their page-long piece to 800 characters. Instead of spending 20 minutes cursing the editor and their mother and then settling into the work they can now whip it into the LLM and check it. Or marketeers having to rewrite a bunch of corporate drivel for a different target audience.
Yes, it's more efficient, and more productive, but not every job is like software where the only relevant measure of quality is how quickly you can get a minimum viable product to market. Some things are worth the effort and craft.