I'm not sure young people can take financial risks, unless they're already rich. If they're not rich, I'd sooner advise people to work for long enough to have a safety net of cash, as well as cash to invest in their idea first. A bonus you get while working is that you meet people who can potentially help you in your business later on. Seeing what's involved in a real business will also help you make more realistic estimates of what you'll need in your own.
The average age of the successful startup/business founder is way older than what the media lets people know by showing only the youngest entrepreneurs i.e. the outliers who are noteworthy. Those people happen to have industry experience and money that can be "risked".