That's a bit of an understatement and doesn't line up with reality. It's not "they might look at it", they definitely look at it. Africa, North America and Europe consisted completely of animals from the meta-wishlist, and the majority of Wetlands also came from the wishlist.
It's more than just "they might look at it for inspiration like any other topic", that's kind of clear at this point.
I agree that they use the list, but don't agree with the argument. I think we also have to keep in mind the point made by
@coatifan that many species were clear or logical choices anyway. There haven't been many cases where a popular wishlist species was picked over a species that would make more sense based on popularity in real zoos, choices in past zoo games and fittingness to the theme.
Africa seems strongly wishlist-inspired as it picked popular species over classical 'safari species' that you may normally expect in an African themed DLC. While the rhino and meerkat were obvious choices, the fennec and African penguin were less so, but this is purely a personal view.
For Europe, I believe that the four animals picked were also the four that made most sense, with the fallow deer picked over the far more popular red deer.
For North America, most species were both popular and logical, but the arctic fox feels out of place and may have been added due to popular demand.
For Southeast Asia, it seems like the entire pack is not based on the wishlist as few species of the pack were notably high on there. Sure they were on there, and some pretty high, but that counts for almost any species you would logically pick for a zoo game.
I think the most definite confirmation we have that they use the wishlist is that Frontier themselves announced the Wetlands DLC mentioning that they picked some highly popular animals. Interestingly enough, the pack also included some of the least demanded choices of all DLCs so far.