I think you've missed the entire point. Rhinos were hunted into near extinction (full extinction for 1 subspecies). 1 million animals... reduced to under 5,000. This was ENTIRELY due to hunting (yes, poaching is hunting). The full reason behind this is human greed (the poacher banking from ivory/rhino horn etc) and what amounts to retardation (thinking rhino horn can cure anything). I'm not against hunting by any means, and yes, at times it can help a population. However, even the top minds in the field state that this is not the case with endangered species. Reference - provided for you pleasure.
Even though sports hunting may have helped the white rhino (a species still targeted by poachers), issuing permits for a threatened or endangered species is concerning, she said. For instance, lions, elephants and rhinos face myriad threats, including habitat loss, poaching, unsustainable sport hunting, disease and conflict with humans.
"For these species, we absolutely oppose any human activities that contribute to additional mortalities, and that includes sport hunting," Garrigan said.