They drew Intermountain, *******, and Northern in group play, then Hawaii in the semis. I haven't heard anything about systematic cheating in any of those sections (Hawaii seems to have the same players back every year, but it's a very small section, too), so those were just even up matchups. Plus, once you get there anything can happen on the court. Even the sandbaggers are just rec players, not pros (except Hunter Emmott, LOL), who have weaknesses and inconsistencies. They're just better rec players, so playing a hundred times, their advantage would allow them to win 90, but at nationals, you only play once, not a hundred times.
I know, or at least know of, most of the players on that team. They're not sandbaggers.