Some people choose or maybe can't help let fear of change guide them away from making fundamental changes that would help.
It's far too common in the corporate world. I could tell you tons of stories about CEOs, to CTOs to Directors of IT, etc that recognize their own issues. Sometime they clearly know the cause of those issues. Yet, even when offered an alternative that would alleviate those issues they choose the devil they know rather than the alternative.
While I openly acknowledge the HC decision making process at Texas is absolutely flawed I also firmly believe Sark is unwilling or unable to fundamentally alter his historic coaching choices to get us even with the top teams in college football.
I don't believe in aggie mindframe of making a playoff is fantastic.
Winning a championship is fantastic and Steve, in the entirety of his career has a single Big XII championship. Conversely, he has consistently shown a shit ton of fundamental issues and has yet to express, at any point, any willingness whatsoever to alter his approach. (Fear of change or unwilling to acknowledge flaws)
I'm confident he will continue on his current path and trajectory. As such, I view the potential upside of a new coach worth the risk even given the potential downside of Texas' HC process and history. (No fear of change)