ChatGPT, a system designed to deal with human language and answer in a way similar to a human, will surely be anthropomorphized, and many people will want it to have male or female voices.
Gender neutral should definitely exist as an option, it makes a lot of sense, but I don't see why it should be the only option.
They would have annoyed less people if the accents weren't so American and quirky. Google Maps has had a female voice since like forever and I don't remember any outrage.