Because cassowaries are nothing like moas and are far more likely to cause ecological damage in a sensitive ecosystem like New Zealand.It’s mostly just a fantasy and a thought experiment…reimagining Eden. Unwilling to wait on evolution’s plodding ways…and maybe a desire to play God.
But also not always without merit…if we are strictly speaking of species that recently inhabited regions from which they are extinct. Capybaras in Florida. Horses in the American west. And maybe sometimes where a wild population (properly managed) can be established outside of it's current range as a means of preserving the animal for later reintroduction if needed.
Why not a controlled experiment with Cassowaries (in multi-acre enclosures) to see if the return of a large flightless bird to New Zealand has merit?
And really it’s just a fantasy and in the most ambitious imaginings unlikely to ever bear fruit.
Feral Horses are devastating invasive species in the American West. They are not good animals to have around. I saw firsthand how they decimate an ecosystem in Arizona. They are an entire huge stretch of desert nearly the size of Phoenix down to just sagebrush, the only plant they wouldn't eat. Barely animals were able to live there, and the horses were all super unhealthy and starving since they had nothing left to eat. They should be eradicated, but they're federally protected for some stupid reason.