Exactly. You can't have military might without loyalty. And you can't have loyalty if you aren't a good leader. Maranzano outfought Masseria because he had greater loyalty among his men and allies, which translates to military power. I believe it isn't a coincidence that Luciano, who headed the largest family, became the top boss in the end. He was never going to accept Maranzano. The one who commands the largest family is destined to be the most powerful boss.