The message said: "In all honesty, this button is just here to make you feel good. Everything will be autosaved as you go."
I have to say, I love the tone of voice.
As for the puppet button: I love that too. people have been trained over the years that software is fallible and if you don't click save on a regular basis you are gambling with your time and effort.
So although the amazing autosave feature has become so common on web document services it still causes anxiety with users. I am sure their customer support team would get questions, and so they decided to include a button - a puppet button.
https://www.optimalworkshop.com