Depends on your theory of communication, I guess. If it’s to get the most tailored message possible, then yeah it is an advancement. But if it’s about communicating authentic feelings/thoughts between two people, then it’s a big step backwards. This might not be super relevant for random website content, but if for example people start using generative AI to communicate with each other, I think it will feel very alienating.
It's exactly the same as using a complex networking protocol to transmit a very simple text string across the internet. There's reasons why it's efficient, and ignoring them is like asking why we can't just netcat from local ip to local ip. Ceremony is, unfortunately, necessary, as is preserving formalities and egos.
I got a thank you email the other day after a meeting that was clearly written by AI, it was a real turn off. English was the authors second language, but she does public speaking in English, so I know she has decent command. Regardless, id still rather get an authentic heart felt thank you in broken English then a fake one. It comes off as inauthentic.