Well, I would not assume that about me, but ten since I know what I do, I don't have to worry about it. It is not an issue.
I don't understand how one can be 100% certain they are not killing even insects once the bullet leaves the gun, if one is shooting outdoors. (Of course the same applies to archery and other forms of target shooting, by the way.)
It also includes walking on the grass, driving a car, riding in a bus, plane, train, subway. And then there is our food supply which is dependent up controlling insect "pests" and not to mention controlling weeds, which has an impact on insects and other animals.
But other than the unlikelihood of accidentally hitting bug in the air, I feel confident enough about what I do so as to not run afoul of your judgment-ism.