That each sentient being has a fee will and is an agent is no more a special law than, say, the speed of light. I don’t see any violation of Ockham’s razor. What you describe as an alternative is a notion widespread in philosophical and mystical circles. I read it once described as soft determinism, a variety of monism. It is often used to explain humanity’s tendency to fall into a herd mentality and as an alternative to evolutionary materialism. I respect it as a theory but it doesn’t stand in the face of clear evidence of how sentient beings act.