Not always correct. Many syndicates in commercial forestry would simply lose their lease if then didn't take every opportunity.Syndicates are about making money, not effective deer control
As has already been said, a syndicate isnt going to cull every deer possible, it would ruin their sport
In any case in such situations its not possible to kill out everything. In one syndicate in I'm its a case of shoot on sight (in season). Cull numbers have been consistent for 20 - 30 years