With billions of TV viewership dollars on the line you would be a fool to think college/professional games are not 'fixed' to some degree. The only question is when and how much. Everyone involved in this from the conferences to the NCAA to ESPN and their advertisers are incentivized the same way - to get eyeballs on screens. They want matchups, they want teams in important media markets, and they want to reinforce whatever storylines they invent. Cinderellas are great and we all love them but Duke has a national fanbase. Duke is $.
But they cant outright fix the games. They cant hand deliver instructions to officials to throw a game because it would leak and it would be catastrophic. If the public at large realized its basically wrestling, viewership would fall off a cliff. Not to mention the impact to Vegas.
But there are things they can do. The leagues can make extremely opaque processes for how they hire and evaluate officials. They can reward officiating that gives them the results they want and the officials will figure it out and adjust accordingly. No paper trail needed. The media can silence conversation about bad officiating by defending or distracting. When its egregious they can blame the individual officials and deflect questions about the system, when it isnt they can ignore it or say its good actually. In either case you'll be called a sore loser.
The end result is that the people who enforce the rules for this multi billion dollar industry are practically faceless. You arnt allowed to know who they are, how they got the job, or how they are rewarded and disciplined. They are above criticism. And while bad calls do happen its entirely accidental and random, and most importantly not part of some systemic issue. You must not believe your lying eyes.