I think a team like Miami allows itself to be divided within the recruiting game when it says, "We are going to put a fence around SoFl" publicly. That right there kills you. Today these statements causes an unconscious division between Miami's Recruiters and top prospects outside Dade, Broward and Palm Beach counties. Believe it or not, it plays right into, "UM favors local kids more" which causes kids from outside those county's to look else where first and develop a little hate for our program. And then you wonder how come a kid like JC would choose Florida first over Miami when Immok is right next door and around the corner.
The state of Miami aka putting a fence around south Florida: is the entire area from I-4 south to the keys which includes Collier County ( that is where JC Jackson is from). Find a map and you will this area produces the most FBS players in the country. Miami's tradition was built with these players. Every program says publicly they need to win the battle for recruits in their backyard then supplement from Out of State.
Go Canes
The State of Miami from yesterday means exactly what you described the map to be. However, today's version of the State of Miami the map only depicts the trio-county area in the minds of most people that don't immerse themselves in Miami's recruiting like you and I. You can look at the posts within this thread and others on this site to confirm what is referenced today as it relates to the State of Miami. You will find that many posters specifically refer to Dade, Broward and Palm Beach as the place to be secured.
With that said, you pointed out that every program says publicly that they need to win the battle for recruits in their backyard then supplement from "Out of State". So then, why would Miami do itself a disservice by creating another state within a state?
Miami should consider the entire state to be its backyard.