If an animal's life is at stake just to get a picture, I totally agree. There is no justification for that! But I think it's just a matter of how a macro photographer has expertise in photography, for me to get good pictures you don't have to hurt animals (insects). A little patience and time are the keys to getting great pictures. I say that because of my experience when looking for photo objects at certain times when the wind is strong, for example, of course it will be difficult by itself to get the perfect photo.