The most interesting part of this is that ChatGPT can create content with more "whimsy" and "humanity" than many tech leaders.

IMO The purpose of such announcements is to maintain the leadership (willing followership) role by reconnecting with followers with a hard-to-fake heart-to-heart. Without this, the warmth is gone. Followership becomes cold and is based primarily on health insurance, salary, visa, greencard, etc...