So, what are you talking about? Freedom or reality?

To answer your question, I experience gravity therefore gravity exists for me. In other words, it exists in my reality. Is my reality objective? How do I know?

(As a proper scientific theory, it should be testable. The easiest test would be to find an observer that does not experience gravity the way I do. Are there, for example, subatomic particles that do not experience gravity? Who knows?)