I mean sort of a flawed logic as there are diehard fans of say, Kentucky Football ... or Mississippi State football ... or Georgia Tech football .... Nevada, Syracuse, Memphis, New Mexico, Arizona, Indiana, etc.
At least Miami fans have won big in the past—with nothing—and always had hope (even with all the pitfalls you mentioned) due to the talent in UM's backyard. There are other fan bases who show out for every game, have tricked out RVs, tailgate like maniacs and bleed their team's colors, to go 3-9 every year.
I have a good friend who is a Washington State grad. He still flies back to Pullman for a few games per year. He goes to see them on the road. He flies a Cougars flag in front of his house here in San Diego ... and the pay off is what, one good year with Gardner Minshew that will have to last him decades? Washington State has won the Pac-12 (Pac-10) twice since 1931 (1997, 2002). They lost the Apple Cup to Washington seven times in a row before last year and two of the last 12 tries dating back to 2002.
The Canes—even in the worse of seasons the past two decades—there's at least been a degree of hope. There are some program that are forever in the toilet and they still have their diehard alum.