The idea that most people just talk a lot and don't take action has been rediscovered for thousand of years. They should cover that in the Introduction.
It's #52 on this enjoyable list.
"That was not "your idea" unless you shipped something, otherwise I invented Facebook, Nest and Oculus Rift"
http://www.talkingquickly.co.uk/2015/04/what-id-tell-myself-...
Just keep telling yourself you don't have an idea until you ship.