Why must we fight? (The World X Star Platinum)

Author's note: ....I have no regrets right now. I'M WILLING TO TAKE IT THIS FAR. HELL YES. LET'S GOOOOOOOOOOOOO!!!

Dio and the Joestar Family were enemies for hundreds of years. First Hamon and Vampire, now stand versus stand. Yes the Stands must obey what their user tells them to do, but... don't they have their own mind? Their own will? Aren't they human as well?