If this new technology really increases people's productivity, as you claim, then fewer people will be hired.
We saw this happen with journalism, a profession where the bottom dropped out.
The whole reason businesses are so interested in AI is so they can save money, and that means hiring fewer people.
The output from LLMs is sufficiently bad that I can't quite understand how people who claim to be writers actually use it, but then I live in a house full of old books on paper, so I'm clearly an outlier.