How do you know they're shooting deer? Opening weekend there were 6 shots fired on our place and not one at a deer. Hogs, turkey, coyotes, etc. Could be MLD with a million does to shoot. Pretty big generalization to think ever shot you hear is aimed at a buck.
Yep. Many reasons to be shooting. Also, what are the numbers like? In our area, every hunter on our place can limit out and still not make a dent in the population. My household alone eats 4-5 deer per year, so guess what, I'm taking 4-5 deer. Chili, link sausage, breakfast sausage, frying meat, roasts, jerky, summer sausage, hamburger meat, backstrap-I bet I don't go 3 days without eating venison in some form, and on average it's probably 6-7 meals a week.
Given that I hunt about 10-12 days a year at our place, you're going to hear me shoot about 1/3 of the time.