I guess i see it both ways. Although I do agree with Mel that it takes nothing away from Nebraska fans. There is a pretty big difference between growing up in Lincoln, Omaha & KC.
If you grow up in Lincoln you are around Husker everything, you are about 30-60 minutes from AAA baseball, semipro indoor football & semi pro hockey, UNO & creighton sports.
If you grow up in Omaha you have AAA baseball, semipro football, semipro hockey, creighton & UNO. you are 30-60 from Lincoln and 3+ hours from KC
If you grow up in KC you have MLB, NFL, MLS, Arena League, Pro indoor soccer, Mid major D-1 sports, Pro tennis & Nascar. You are 1-2 hours from 3 Big 12 schools and all their sports. You have one of the best D-II football teams 90 mins away. One of the best D-II baseball teams about 60 mins away and I am sure I am missing others.
$$ is one issue in that there are so many options and not enough cash to go around. My opinion is that there are just more options. More teams to fall in love with, more things to follow. Its not that your love/loyalty is more or less than anyone else. Its just there are less people/things to share it with.
Perfect example, I know plenty of people who love KU/MU and grew up Chiefs fans. Some can afford the $ is takes to have season tickets to both. Most have to make a choice. Do I spend my $500 on MU tickets or spent $750+ on Chiefs tickets. THey are both close and available.
Most of my friends in Omaha have never been to an NFL game. Do peopel from NE make it to Chiefs games, hell yeah they do. But not as often & not as many as go to Husker games and vis versa. You see lots of Husker gear at a Chiefs game, but how many make it to husker games.
Loyalty is loyalty. I think the thing that would fit best is "you staduim is only that big because / you have no problem selling tickets because"
Another point on this is, Nebraska, as a state, is almost fully behind the university & much of the state has no other teams near to follow locally. Where as MO, OH, PA & other states have multiple pro teams on different sides of the state. Plus college teams and so on for the people who grow up and live there.