Many people fantasize about running their own business. The idea of being your own boss, setting your own hours, doing what you love and, hopefully, making a lot of money, is hard to resist. Of course, the reality of not only leaving a current (likely safe) job, setting up a business, and actually succeeding is quite different.
Leaving the security of a job to strike out on one's own is not for the faint of heart. The more you have to risk, the more you have to lose. It's no surprise that many people begin running their own businesses when young and with relatively limited assets.
As I note in the Blooberg article (see link - click title): If you have been thinking about starting your own business for years but have never taken the leap "you may have to face the reality that you aren’t cut out for entrepreneurship."