The ease with which he can use AI is the same as for everyone else. Therefore he gains no relative benefit and can't "make money from AI".
However, information-retrieval and "thinking assistance" helps everyone at the same time. Asking for summarization and clarification of any (legal or technical) document, finding the right references, and so on. It's like everyone gets instant access to a research department.
This means fewer people are needed for "clerical jobs". Effectively, it diminishes the economic value of memorisation and mechanical information work. But that's probably good a thing.