Ayuh bro, let me answer u in newbie way then.
Airport or base can caused a lot of difficulty and nuisance problems to the surrounding area esp if housing area or township maker is very adjacent.
The air polution, noise pollution of the planes or aircrafts, the risk being of an area for aircraft landing & risk of crash and obstructed the view of the pilot or captain, the communication services of DiGi, TM, Maxis interfered the navigation and communication of the aircrafts and system upon departing and landing, etc.
Who is going to risk their life in long term staying next or very near to airport and which banks are willing to finance such hazard and environmental affected location prop?
That is the simple element why airport was built from the distance of matured housing area, city, away from highrises, and etc.
Thats applicable not only to our KLIA but other countries major airports.
Thats why we only able to see some factories near it, restaurants, hotels or motels.
Government will also nt willing to approved the DO to the developer for land too adjacent to the airports and must be within certain radar and heights of the building.
Ty for sharing boss....