Starting a successful business is not probable. Statistics show that most businesses fail, and many before they open their doors. Some stop right there and do not try.
But others think about how to turn the statistics in their favor. They learn, read, experiment, meditate, ponder. Probability does not equal possibility.
Another point in a similar vein: Statistics show that dropping out of school leads to a higher chance of poverty. Beating those statistics is possible. And such a decision can sometimes be better. Of course your mileage may vary.
In short: Statistics say you should not open a business. They also say you should stay in school. But if you are smart and a hard worker, those statistics should motivate you.