I do agree that the text generated by ChatGPT isn't really "natural" but more verbose and text oriented, some things that a native speaker would not necessarily say and won't understand speech nuances. It's clearly not perfect, I'm really not claiming that it is.

It's a good tool that I'm going to use a few times per day though, there's no really substitutes to speaking to get better at it. I'm also using other methods and tools and this would be a minor addition to my learning schedule.

> I spoke in my native language with traditional accent and it still made mistakes, also it hallucinates.

I'm also in this scenario actually because I'm a native French speaker and I cannot make myself understood by Google or Siri at all because my accent is way too strong and far outside the training voices that they used.

It's kind of a paradox but it's less a problem for non native speakers in my opinion who are trying to pick the most common accents they can in order to be broadly understood.