You make a great point about the success of AI-lawyer pairing. We need to avoid the Lump of Labor Fallacy[1], in which automation only replaces lower-level work. Advanced tools will allow less experienced (but, let's not forget, intelligent and highly educated) lawyers to perform more advanced work at an earlier point in their careers.
[1] https://en.wikipedia.org/wiki/Lump_of_labour_fallacy