What the F**K kind of lifestyle do you people have!!!
This is not the 1600's when all you had to do with your hands was farm and crush skulls!!
In almost 25 years of Martial arts training ( traditional martial arts training
), I have never had the need to kill a bull with my hands or punch through a tree or concrete wall, or strike through an opponents chest and pluck out his heart!
I have used my art(s) countless times all over the world in defense of myself and others. I also have the need to make sure that my soft, well manicured hands serve me until retirement age.
You do not need calloused, knotted ,gnarled, arthritic hands to prove that you are a good fighter.
Get a clue.
PS in response to the question: Some light Makiwara is important, but there are other ways to develop kime. The heavy bag is very important, for all the reasons that you all already know.