Motivation to build what you really want to build is completely different from being motivated to work for a salary to avoid starvation and keep your family going.
Motivation, and particularly knowing exactly how the work you will do will benefit (yourself, your friends, your company, the industry, society).
I imagine it's a lot easier being a doctor who is actually helping individual people squeeze in one more patient, vs. spend overtime filling in paperwork. Same difference between working on an awesome product where you have total visibility into the whole process, vs. beng a cog in a much larger wheel.
