do you mean that they will became rare from poaching. maybe true but maybe they are better on the way than we believe. its not the first time that we seeing big game coming back when everyone was thinking they are close to extinction.
of course I dont believe any "expert" who live from telling you bad news.
believe that jaguar's can be a great benefit for a hunting area if you have to market it. the most who pay will never see a hair from a cat but they will allways have a little bit of romantic shudder when thinking " he can be here".