It's kind of funny to see so many people warning of how difficult it is to start a business and that the failure rate is high. Of course it's hard, otherwise everyone would be doing it. Getting a job is something that anyone can do, which is why most people have a job.
As far as the failure rate goes, I think what many people don't realize is that your chances of success go up after each failure. That is, assuming you learn from your mistakes (if you don't you might as well not even start). 90% of people may fail at their first business attempt. 60% may fail at their second, and 30% may fail at their third. That's my understanding. I've pretty much failed at my first attempt right now, but I learned so much that I know I have a better chance to succeed with the next attempt.
There's nothing magical about it. Business skills can be learned like any other skill -- by doing, failing, and learning from the failures. Nobody ever gets good at something without initially failing a few times at it. It's just that with a job you're allowed to initially fail and still get paid (the employer sees your training as an investment), and with a business that doesn't work. Unless of course you get venture capital in which case you can fail and still get paid a salary.