Management reasons. You get to use up to 5 tags of which no more can be 3 antlered. You might be surprised how many landowners allow you to use all your tags. Not every buck will be what they consider a trophy. A lot of ranches are over CC also. If (that proverbial "if") we ever get back to normal rainfalls then numbers rebound very quickly and 5 tags might not be enough on many ranches.