One of the biggest reasons it gets harder to do new things as you get older is that new things are generally undignified at first (indeed, this is an excellent heuristic for discovering them) and the older you get, the more dignified you're expected to be.
Advertising adds value to a product by changing our perception of it. An example I love that is not mentioned in the book: for years, few people bought “death insurance.” Then some genius changed the name to life insurance and grew the industry by many billions of dollars. After all, life insurance sounds so much better than death insurance.
Founders are taught to possess enough faith to will whatever they’re working on into existence but are rarely reminded to worship anything but themself. This creates a pressure cooker of responsibility that distorts reality to the point that they often find it hard not to confuse themselves for God — and we all know how that ends.