A renowned author would still write. They don't suddenly start managing a team of junior writers and instructs them how to write.

A programmer that has climbed up the ladder in their field, on the other hand, often stopped coding themselves. Instead, they manage others who code, or provide vision/direction on the project.

I think it really depends on what people on the senior level of your field do. If they mostly move to managerial roles, then it's much more likely they'd embrace LLM.

Ironically I observe this in academia too. Professors (who often stopped doing hands-on research, but only provide guidance to postdocs and grad students in their research) tend to embrace LLM more than the fields you mentioned.