You’re right, but they’ve put insane points on the board and we’re not built to win a game that goes into the high 20s/30s
Nebraska is built on defense, and while Indiana has good defensive numbers, their P4 opponents are scoring on par with how they score against the rest of their schedule.
Indiana
Northwestern averages 21 points per game vs Indiana they scored 24
Maryland averages 29 points per game vs Indiana they scored 28
UCLA averages 14 points per game vs Indiana they scored 13
Charlotte averages 24 points per game vs Indiana they scored 14
Florida Intl averages 26 points per game vs Indiana they scored 7
Nebraska
UTEP averages 18 points per game vs Nebraska they scored 7
Colorado averages 30 points per game vs Nebraska they scored 10
Illinois averages 31 points per game vs Nebraska they scored 31
Purdue averages 23 points per game vs Nebraska they scored 10
Rutgers averages 26 points per game vs Nebraska they scored 7
So the question I would ask would be, is Indiana built to win a game where the opponent holds them to 20-23 points or about 40% of their average?? Because the Indiana defense has shown, that their P4 opponents will score just about exactly what they average.