Here's my thoughts on this. I think this has more to do with how wide our spheres of inclusiveness extend, or how narrow they are. Back to evolution again, in the view of developmental theory, if you look at how we as humans develop our sphere of those included as extensions of ourselves, begins in childhood with one's parents and one's immediate family members. In time it extends to include one's peers and friends. In time it becomes one's community or group membership. Eventually, that may extend to one's ethnic group.
Then beyond that to one's nation through national identify. Beyond this, it may evolve to include the global community of all humans, outside ethnic and national boundaries. And then beyond this, it may evolve to include all life beyond human life. And beyond this it may extend to include the entire cosmos and all life everywhere in its potentials as yet unencountered directly. One's center of identity moves from family, to the entire cosmos.
So to answer the question, the larger that circle of what is included versus excluded with what we identify ourselves with, and have empathy and a conscious connection with, will determine how we see and interact and treat life forms other than our own. Many have no problem just smashing that insect as if it were nothing at all. Others would consider that to be an unjustifiable aggression against life, with utter disregard for its beauty and miracle of existence. It shows that they see only themselves as valuable, and don't see anything else that isn't them as worth consideration. That is a matter of levels of awareness itself.
I find myself able to connect with all life at the spiritual level, yet at the same time I recognize the practicality of the natural systems we live in, as mentioned about the co-evolution of humans and livestock (not the industrialization of it). I see it as literally being that "stewards of the garden", to borrow that metaphor. It is a moral and spiritual responsibility we have. I do not believe in killing for sport, "Yeah, I got him square between the eyes!" But I do recognize killing for food. That can be done from a place of respect and regard for the life that gave itself for you. It's not "nothing" to kill an animal.
So balance is the way of life. It's yin and yang, not "Yang baby! Crush that ant hard!". Nor is in all yin, when you are like the Jain who walk five feet per hour in order to not kill any insects that might be on the ground. Both are extreme imbalances. Favor the yin, but utilize the yang when necessary.