If in forty years of football, a P5 team has started only one black quarterback for more that one game, that sure in the hell says something isn't quite right.
I can think of two at K-St right off hand - Micheal Bishop and Ell Roberson. Don't follow the Big 10 much, but I believe Purdue has had a black starter within the past five years.
With all the talent in black qb's over the past 4 decades, it says something about your school if you've only had one. There's something going on when every other school has started multiple black quarterbacks and you've lagged behind.
It's not dumb, it's a data point.