I was pondering for a while on determinism and had a hard time explaining how we living things are seemingly able to change our surroundings by force of will. Inanimate object can change their environment but their actions are defined purely by the laws of physics (for instance, flowing lava burns the ground but that's just what physical law determines it must do).
Living seem to do things differently, but tonight it hit me that they cannot. There can be nothing that comes out of living or non-living things in of themselves, otherwise these things (actions) would be appearing out of nowhere. Therefore the conclusion is that living or nonliving things are all just forces of nature. Our behavior might be more complicated than water running or rocks falling but it's all the same. From the frame of physical determinism, there cannot be any action that comes out of me that I would be the source of. So I must be a force of nature.
What argument could be made against this, assuming physicalist determinism?