A great point, that I haven't seen in too many places. I sometimes feel like we're seeing too many people who "want to have a startup" for the supposed fame and fortune, and not enough who are truly passionate about an idea. Believing in an idea will get you through, not dreams of gold coins.
Sam, I noticed you didn't mention watching cash burn or unit economics. Is that a later section you might add? Too many founders don't realize the importance of that until it's too late (speaking from personal experience)