A Werribee safari truck driver is not an expert on collection planning (not to mention, will probably receive a dressing down when this thread gets read at Zoos Vic HQ - please be gentle with them, guys, we only ask because we care!). As noted above, they are a customer relations staff member first and foremost.
I guess if I wanted to turn Melbourne Zoo into a one-stop tapir breeding shop I could wedge ten of them in somewhere, but it would come at the expense of other holdings and I really, really doubt that's the strategic path they intend to go down for a not-quite-ABC species.
It would, as noted, be out of character for them, and for no really apparent reason when there's plenty of zoos in the region with recent history with tapirs - they're either held or were recently held at Adelaide, Taronga, Mogo and Darling Downs, and that's just off the top of my head. Tapirs would also be very much in Altina's wheelhouse too, and I can see how they would fit at Halls Gap and Wildlife HQ.
If there's any truth to it, it could be that Melbourne will be the importing facility and there are plans to re-establish the population with a total of 10 founders, which will be progressively farmed out to other aspiring holders.