You are right about this replacing run-of-the-mill coaches.

Good coaches do not follow Agile and Scrum dogma. At present, ChatGPT parrots what the Agile community says, because that is what ChatGPT was trained on. But much of the "standard narrative set" is wrong. This article won an award for "best Agile articles of 2019": https://www.linkedin.com/pulse/agile-community-embraces-unworkable-fantasy-cliff-berg/