You mean... A chance to gain experience without killing non-aggressive animals?

"I am a shining example to the world."
"Oh yeah? How'd you get so strong, sir knight?"
"I slaughtered one hundred herds of rabbits, sheep, and my favorite food-crab."

One of the things I really like about Final Fantasy XIV is that you gain experience by crafting and harvesting. It makes doing those things more interesting, and allows you to gain strength by -not- killing all the time.(which is even reasonable, since smithing and sewing take muscle strength and dexterity and all that).