You've got a set of cards, some of them can be really good, some really bad. This can the country you were born, family financial power, genes, etc
If you have great cards and play poorly, you can still lose pretty badly. If you have bad cards initially and know how to take advantage of opportunities (new cards that are dealt), you can win.
Hard work is improving your chances for success, you'll unlock more opportunities and it's up to you how you handle them.