She didn’t make that point at all. She starts with “not because of the robot apocalypse” meanders in the middle about ‘prompt engineering’ aka telling ai what manner you want it to respond in - Shakespearean, technical, encyclopedic - (yea, we know) then ends with “it’s better to be polite”. It’s clickbait. She literally does not address why saying please is important outside of the last sentence where she said it’s better to be polite. Saved you a click.