yes, this is true Hix, the rainforest aviary has taken many decades to establish the canopy effect we today enjoy, but there is no reason Taronga couldnt have created shadier enclosures for their tapirs earlier on, whether by using natural trees or artificial means.
it could have went all Cincinatti Sumatran Rhino and virtually sealed out all UV with artificial shade structures, but the newest enclosures are pretty much too little too late. even a real canopy of trees could have been provided; during Wild Asia's construction dozens of mature trees were transplanted in from other sites across the zoo. as it is, the army camo draped without imagination over the underwater exhibit was installed well after Wild Asia opened, which to me typifies the Australian approach to this species.
as an endangered species which actually can be imported, with a long life span and being an asian species, i would love to see this species prioritised again in the future but this time given better conditions.