According to who? Because we get paid roughly $500k annually for our football rights and $4M annually for our basketball rights. The numbers would seem to disagree with your post.
From a TV/markets perspective, UConn is the dominant brand in a mid-size (by population) state with no pro teams, plus significant market penetration in large neighboring markets (New York, New England); a national brand in basketball; and has been competitive in football when it was in a power conference.
Compare the B12 properties: only Kansas compares as the leading brand in its state, but Kansas is a smaller state (3M vs 3.6M), and has pro teams and a competing university (Kansas State). Iowa State has Iowa as a bigger brand in a better conference, UCF is at best the #4 college brand in Florida which also has numerous pro brands, Cincy is second to Ohio State and to numerous pro brands, Baylor/Texas Tech/Houston/TCU are of minor significance compared to Texas, Texas A&M, and pro brands, WVU is a state flagship but in a smaller and poorer state, Oklahoma State and Kansas State are like Iowa State secondary brands in smaller states.
Only Kansas and Colorado would be of comparable value to UConn.
The current payouts are not reflective of brand value, they also depend on who you are playing and quality of distribution. In a major conference UConn football becomes far more valuable. UConn's market adds to the value of all the teams it plays.
And if basketball value devolves from the NCAA to the schools, that will add greatly to UConn's value. No other available school has the same upside.