I leave it on because I don’t want to land to an empty airport. Hahaha. But yeah, I see what you mean. It’d be nice if each airport has a list of ICAO airline code that are assigned to them. So only those liveries that belong to that list gets randomly generated in parking.
If the airport is handcrafted, they could have each of those ICAO code list to be assigned to each gate. That way only certain liveries spawned on their respective gates. And if we fly using that livery the ground ATC will assign you to the allowed gate. So that you’re not parked an international flight into a domestic terminal.