That resonated so much with me.
I quit my job to be on my own about 7 years ago and I used to tell (with a lot of passion) everybody who seemed even slightly interested to quit their job. I just couldn't see why anyone should ever have to work 9-5. It was only a few years later, that I learnt through my own experience why so few people can be entrepreneurs or voluntarily self-employed. And ever since I have been very careful about encouraging people to start a business and quit their jobs.
That's also why I find so much of the "inspirational talk" on the internet so insincere and dangerous.