It gives you a great safety net. It lets you speculate in the great game. 9 in 10 ideas will fail, but that's ok as you won't end on the streets.

Those without the safety net have far more to risk, so are far less likely to succeed. For every richard Branson who starts up a company from the back of their van there's 9 who do that and fail, and are currently on minimum wage stacking shelves. For every millionaire actor there's a thousand waiting tables. For every musician there's 100 teachers. Very little to do with how good they are, all to do with the lucky break.

Hell where your parents live makes a massive difference. When you start out with a job in the big city, you either live rent free with parents and thus save £10-15k a year, or you put your entire wage to paying bills.

After 5 years you have 70k, enough for a confortable deposit on a house, or a few years of speculation, or investments that will grow to half a million by retirement.

If your parents don't live close to where you start your career you're far more hand to mouth.