You didn't list any counterexamples, or at least we have no way of knowing if they are counterexamples. You've listed a number of examples where the startup fo

You didn't list any counterexamples, or at least we have no way of knowing if they are counterexamples. You've listed a number of examples where the startup founders had young children while successfully growing their companies but we have no way of knowing whether they were equally successful on the parenting front. Perhaps they sacrificed their parental responsibilities to achieve their business success.