>it's pretty easy to tell some generative software to "Female giving a presentation in a well lit office with windows open" and get something pretty decent.

As someone who actually tried it, with current models it's possible but neither easy nor straightforward. Getting decent and coherent images is still hard and requires finetuning, so there is certain value in this. And for very specific and series-consistent images I'd still rather set up a photo session if I had a studio.

It will change for stock photos, but probably not very soon.