This is sad, but from a biological perspective, it's oddly tautological. Men are organisms that run huge risks in hopes of huge payoffs, while women run smaller risks for more certain rewards. One could consider a male lion to be an entrepreneur, and a lioness to have a steady job. However, in nature both strategies are equally successful, while in the modern world being an entrepreneur is more effective.

On the flip side, men are incarcerated much more frequently than women, and for similar reasons. This is somehow not as surprising.