If you have the luxury of a safety net or in-demand skillset, then yes, getting laid off is not a risk. If you have less means, and the costs (both monetary and social/emotional) of needing to relocate to find another job turn into something much more daunting. In that kind of situation, loss of a job is a very negative event, much more than, say, a 10% decline of a wealthy person's portfolio would be.
re why work for an employer when you could take your own risk: generally speaking the odds of losing a job due to layoff are still less bad than the odds of a bootstrapped business failing, even if attempting to start a business was a realistic option, which it is not for many people.
Losing a job is a negative event, the parent is not disputing that. The parent is disputing that there is minimal risk for an employee, they are getting paid month to month for their work.
re why work for an employer when you could take your own risk: generally speaking the odds of losing a job due to layoff are still less bad than the odds of a bootstrapped business failing, even if attempting to start a business was a realistic option, which it is not for many people.