It's not laziness of the part of the fans. Miami fans are, and always have been, all about perceived entertainment value. Give them a good UM team AND a good opponent, and they will show up. About the only teams that will draw well regardless of those two factors are ND, UF (most of the time) and FSU.
They aren't going to show up for Arky St. no matter how good we are. That's the way it has always been. SLS has nothing to do with it, IMO.
And...I don't know where the perception that all cane fans live close to campus comes from.