Perhaps I don’t read enough on the web… or I just ignore posts about quitting your day job.
I believe anytime you quit anything out of a desire to get away from it — you just bring that dissatisfaction with you. You can transform where you are into something fulfilling, and as part of the process when you no longer fit you’ll naturally eject.
For me, a career is more a process of self-discovery — figuring out who I am: my skills, interests and how I want to contribute to the world. But my happiness / peace / serenity is separate from that. It doesn’t come from a lifestyle, it comes from within.