Niel..............first of all I did not say that YOU did put and take hunting. I merely said that there are operators who do, as you well know, and the prices paid for those released animals are passed on to the consumer with a profit margin added. We all know those places exist............they are quite common. There are even some pretty large operations that routinely add a few loads of shooters to the property for the 'season'. Not all are working on a sustainable harvest policy with breeding herds.
Secondly all your info on management applies to all game everywhere and is nothing new or astounding. Large males of any species make up only a few percent of the breeding herd, whether it is moose, bear or nyala and with many species it may in fact be less than 5 percent and in the 1 to 3 percent range........especially in free range wild conditions where natural predation is also a factor.
I also asked some more pointed questions about horn growth, age and brooming of the horns on nyala to see if what I believed about nyala was the case and it was answered by an American hunter, Enysse.
It would seem obvious that the best animal to take, as CT mentioned, is an old bull, whether he is 24 or 30 inches due to genetics and regardless of whether he did or did not wear his horns down. So if in fact the trophy bull of 30 inches that the client is directed to kill is past his prime, and has passed his genes around on your property for years, then why is it worth a higher trophy fee than another old bull past his prime that is 26 inches. They have both done their thing on your place and are now expendable. The shooting of a 30 inch bull that is a prime breeder is a loss to the overall herd when he still has a number of good breeding years left in him. The bull past his prime is not.
You are not 'taking monster bucks out of the system' if you are only shooting the males that are past their prime.
Just my point of view.
Cheers.