I suspect it isnt a colorado thing as much as its just a common ncaa trend thing. Good coaches move up. If they have a bunch of success still, after how awful theyve been recently, schools larger and with better resources than colorado are gonna come knocking. Its not that crazy to think hed leave for a blue blood.
Youre kinda over reacting to this.
I think it happens far less than people believe.
Texas - hired a American Conference HC
Georgia - Hired a P5 assistant.
LSU - hired from within
USC - hired from within
Michigan - from the NFL
Alabama- from the NFL
Oregon - American conference
UCLA - NFL
Florida - Mountain West
Notre Dame - American Conference
Virginia Tech - American Confernce
Stanford - from within
Auburn - from within
Oklahoma P5 assistant
A&M - American conference
Tennessee - CUSA/ American
Florida St - from within
Miami - unemployed
Washington - Mountain West
Clemson - from within
On the other hand
Wisconsin - from Pitt (returning to alma mater)
Nebraska - from Oregon St -
Oregon St - Wisconsin - not a move up
Penn St - from Vandy.
Arkansas - Wisconsin one could argue this is not a step up
There might be others. That was just off the top of my head. P5 HC to P5 HC moves don't happen all that much.