To the contrary. Let's just take a look at the history of football coaches since the 1970's: Cal Stoll (fired after 5 yrs), Joe Salem (fired after 4 to 5 years), Lou Holtz (bolted for Notre Dame after 2 seasons), John Gutekunst (fired after 5 years), Jim Wacker ( fired after probably 5 yrs or so), Glenn Mason (fired after 10 yrs), Tim Brewster (fired after 3.5 years), Jerry Kill (resigned for health reasons after 4 plus years), Tracy Claeys (fired after 1 yr.) P.J. Fleck (current coach).
All except for Fleck were hardly spring chickens, and ONLY Lou Holtz used the U as a stepping stone. We, as fans are always paranoid about getting a young successful coach who will bolt for greener pastures in a few years, but the alternative is to have a litany of coaches who DON'T succeed here and their head coaching careers end with a firing. The U needs to attract and then learn to KEEP successful coaches whether they be young or old.