You all are focusing on the wrong thing. SU is a small private school in a not highly populated area with most of the alumni not living near by. That is the reason why we have roughly 37,500 "regulars" at games. Our number of regulars is small. One cannot expect casual fans to drive attendance.
Private P4 schools avgs 2018-2023 (not including 2020):
Notre Dame 76,108
USC 60,316
BYU 59,058
Miami 50,684
Baylor 44,087
TCU 43,835
AVG 41,190
SU 37,873
Median 36,804
BC 35,734
Stanford 34,746
Northwestern 32,848
Wake 28,623
Vanderbilt 26,499
Duke 23,499
SMU 22,755
So we are 7th out of 14. That makes us slightly above median but slightly below avg. Are we not where we should be?
We are also ahead of public P4s in Maryland, Cincy, Fresno, Boise, KU, Oregon State, San Diego State, Houston, Washington State, Colorado State.