One of the main reasons, basketball powers are not really football powers for the most part.
Basketball powers over the last 35-40 years, UCLA, NC STATE, DUKE, UNC, KENTUCKY, INDIANA, KANSAS, Georgetown, Syracuse, Maryland, UNLV,
Football powers over the same period Texas, Alabama, Miami, FSU, Fla, Oklahoma, USC, Notre Dame, Nebraska, Auburn, Ohio State, Michigan.
It's either or for the most part.