Miami is one of the few teams situated in the right area and the prestige to knock off SEC teams.
The southeast from Georgia west to Texas has, by far, the most talent and best athletes. Almost all the schools with the resources to take advantage of that are in the SEC. Really only Clemson, Miami, and FSU fit the profile to compete with SEC teams in the region consistently. USC out west can compete if/when they lock down California and recruit nationally. Ohio State competes cuz they lock down Ohio and recruit nationally really well.
Most northern and western schools just can’t get the guys to compete with schools in the southeast, they don’t have the local or regional athletes to sustain that kind of success.