I never understood the argument "you're already doing a little bit of xyz, so you might as well do more of it". I hear it from meateaters all the time: "you already kill bugs when you walk and drive your car, so why not eat meat?" HUH? I can't help but harm some animals, so it means I should deliberately go harm more of them??? A baby feels some pain coming into the world, which can't be helped, so the parents should go ahead and cause them more pain?? Doesn't make any sense whatsoever.