Marineford Admirals are heavily turf restrained dude lmfao. If they weren’t, Aokiji and Akainu could have just dueled at Marineford, they didn’t need to sail to an uninhabited island to fight, they could have just fought at Marineford. Lol
Also if Admirals weren’t turf restrained at inhabited islands, they wouldn’t need to go out of their way to select uninhabited islands to fight at. Lol