But the reality is that AI is being used in all sorts of professional environments in very productive ways now,
The reality is that that claim is anecdotal at best as there is no way to quantify the productivity of LLM use.
Productivity is value generated per unit of cost. You cannot reliably predict the token use of successfully completing any given task or even reproduce the same token use for running the same task again later. If you cannot quantify the cost you cannot quantify productivity.