Yeah true that and i do agree but there allways has to be a first.You missed my quick edit.
Quokka and little blue penguins for example also have just one holding in europe, but itd known that the EAZA intends to build up a breeding population across multiple zoos, so they can be seen of a sign what is to come.
Ofcourse not all solo reps are like that, afterall they can also just be the last ones remaining on that continent, but especally with newer additions the first is more likly