I can see your point to a degree, that's kinda been my view on it. But my mind is changing somewhat as I get older. At 51, I'm not as quick to move, as brave to sit still and NOT move, or as quick to heal. Plus, my 78 year old dad that still works EVERY day,  bands and tags the majority of every calf the day it hits the ground, surely soesn't need a cow like that to contend with. So, the overly aggressive ones time on our farm get shorter as the years go by.