At the end of the day, for Medium to exist, they will need to adhere to search engines guidelines' about AI Generated content. And seeing how Google will penalize AI generated content in search, it won't take long until Medium will see it too (or they won't and that will be the end of this platform).

As a writer I find tools like ChatGPT really useful to not stare at a blank page. You don't need to let it replace your entire job, you can use to the way its creators intended - to help you make your job easier.