I think it's a semantic misunderstanding. In the original question "object" was meant as a "physical object", as opposed to a kind of phenomenon like reflection

I think it's a semantic misunderstanding. In the original question "object" was meant as a "physical object", as opposed to a kind of phenomenon like reflection and so on. You have used a more philosophical definition of subject-object dichotomy. On an unrelated note, I've seen a couple of books whose authors claim UFOs are actually subject-related phenomena.