I disagree with that advice as there's a whole plethora of people creating startups in the name of "entrepreneurship" who lose thousands.

I think the golden rule for starting a business is "don't; unless your idea is really special". Too many people rush into business with half-baked ideas and a romanised vision of being their own boss, only to discover that their ideas were garbage to begin with. So I'd rather have a boss than start a business just for the sake of firing my boss.