There's lots of reasons a person may want to shoot a 1.5 year old buck, even beyond the culling principal the OP describes.
Not everyone is a trophy hunter. Some people just like to shoot the first legal critter they see, so they can get back to the bar. Some people just want meat.
I like deer meat and the bar myself!!
I have killed those little phaggot racked bucks and now I just hold out for a decent mature buck.
Let the neighbor kids, my nephews, younger cousins and my cousins wife work on the smaller bucks.
