You pay the human because you assume they take responsibility in this being correct. If they literally copy-paste without checking they are no better than AI. In fact they may be worse.
If they literally copy-paste without checking and it turns out the AI was wrong and you suffer harm from that you can sue the lawyer for malpractice.
My comment was not intended to express support of using AI instead of lawyers, but rather to express the pointlessness of "disrupting" human lawyers.