If diverse viewpoints helped, then we'd expect a higher proportion of companies with diverse viewpoints to be successful. If that occurred, it would be (weak) e

If diverse viewpoints helped, then we'd expect a higher proportion of companies with diverse viewpoints to be successful. If that occurred, it would be (weak) evidence in favor of the hypothesis. In contrast, the relative scarcity of such companies is (weak) evidence against the hypothesis. That's just how probability works.