He may have a point but I don’t see it.
If he has real world cases existing in modern hunter gatherer societies he may persued me.
It's the lone hunter thesis.
There are biologic models of this. Killer whales come in a couple of varieties. First, there are the pods ~ much like any sea going mammal society, the pods cooperate in hunting, have family lives and friends, and are "friendly" to others who own very large steel hulled boats with massive engines.
Then there are the solitary killer whales. They are not friendly. They will even attack boats!