An honest answer for why we don't do well in these multi-sports awards.
GT was just not as big as these public schools at the top of the rankings, so we didn't have as many male sports before Title IX. When Title IX happened, GT was also more male and so we didn't have to create as many female sports as, say, UNC.
UNC could theoretically drop enough male and female sports to be at the NCAA Div. I minimum like GT is. In practice, an AD may not want to rock the boat with alumni by unnecessarily closing wrestling or swimming programs, even if that means more revenue dedicated to the revenue sports.