But yes, I would say that if we are talking in reference to a physical body, then what you say is most probably true. Given the universe where a physical body exists within real parameters that extend necessarily in discussion, human beings may project their own reality upon what is otherwise an objective reality.
So yes. It is very possible to understand reality through the idea that you have proposed. And it makes sense. But it still doesn’t explain how it is possible that you are able to know a subjective reality that is projecting, from a otherwise objective reality that somehow stays in place outside of what is subjectively projected.