I'm no whatever studies that but wouldn't there be a difference between using a stone to smash open a coconut and sharpening a stone, attaching it to a stick, and chopping down a tree with it?
The historical context here is that's how you cracked eggs in the middle ages, before they had our modern egg-cracking technology.
You balanced the egg on the head of a priest or monk and then hit it with a rock.
So the excitement comes from the imminent enjoyment of a freshly cracked egg.
Lol primates use tools pretty often. But I guess the message here is "it's okay to use violence to get revenge" or some other misguided bullshit and not a reflection on our place in the web of life.