In this particular case, I do agree. But the thing is you're talking about an exception here, I know a lot of people that are very good at their craft, they lack the fluency in English; While they understand the scope of services announced by the buyer, GPT for them is a way to finetune their communication and make it more professional and appealing to English speakers.
I agree that having GPT or AI in general as a substitue for communication is bad for the platform and its buyers (and the sellers too), but I do think that it can help the not-so-good English speakers, that are really good at their craft, speak in a better and a more professional manner.