How many work hours would it take for the average professional artist to get to this level of technical proficiency? Given the opportunity cost I'm sure you could argue it would be a net loss for the employer.
The mistake companies make is in not fully embracing this.
Alright, once you get it running the UI for generative fill can be used by a graphic artist, and now you're several months ahead of your competitors, but still the UI is a little rough. But it's open source, so you have your techs make it a little better.
Now your company needs to make it easy to submit a pull request, or you're suddenly maintaining your own fork, which you're going to want out of as soon as you have an alternative, and soon your company is paying $$$$ to Adobe again.