The grotesque images: Simply put, the model is not good enough yet. This will improve over time as the models get better.
Diversity/male gaze/heteronormative: Generating men and other genders did not yield very high quality results unfortunately, so I didn't include it in the initial launch. I am also manually fine tuning the prompts, so it was easier to pick one category (women) and go with it. I hope to expand this in the future.
Sex workers: I do agree with the quote in the article that this will not replace sex workers (at least for now) in the same way that I don't think dalle/midjourney/stable diffusion will replace illustrators. In the future, I believe this technology could create a new category of sex worker that can generate content without using their own body (similar to VTubers).
It's harder to say what will happen in the future though. If these models keep improving at this pace, I think these types of discussions will be more important. Let me know if you have any questions!