Your callused being seemed unmoved by the whimpers of a defenseless bird, but nobody can say you did not try. Kind of. If trying involves putting heavy things on tiny things not meant to have heavy things placed on them. Who really knows? Probably everybody, but do not let that stop your treacherous torpedo of apathy. You just keep making sure you are okay, and do not worry about anything else. That is a completely healthy and normal way for anything to exist: in a vacuum.
Would you like to try again and maybe not be so heartless and self-serving this time?