I snuck up on this one once and let him sleep.
He was with 20 head of does and I wanted him to pass on some of what he would grow into. The very next morning he wandered off the ranch and he was shot.
This year we took a load of elk deer and antelope. I helped many hunters fill their tags. I drew no B tags. So I passed on some bulls, and some mule deer smaller than I wanted to take, and let my wife fill the freezer. So yeah, I agree that sometimes you just need to give them a chance to grow. But if my wife had not gotten her Bull I would be eating one I shot as I am also a meat hunter.