I don't understand people's issue with this statistic. It's not implying causality of any form.

It's simply saying: "the common idea that the only successful entrepreneurs are workaholic young singles working days and nights is actually a misconception. Proof: 60% of successful entrepreneurs are married with children."

That's not bad statistics, it's completely helpful, if nothing else for confirming a suspicion you may have had anyways.

Bad statistics would be saying "so in order to be more successful as an entrepreneur, get married and have a kid."