But they may be willing to pay $200/hour for your AI (plus, of course, your final expertise in the matter as the lawyer), and the firm can ditch the paralegals and pocket the difference.
The point is, if you need fewer grunts doing the busywork, you can charge less and be competitive.
But they already do! There are cases of professional service firms creating their reports using LLMs, there have even been a few prominent scandals re the fake data generated in them