Good post, although the only thing I would say is that you should remove the "(yet)" from your post as empirical methods of study can never possibly conclude about that which cannot be observed. For that we have philosophy, mathematics, and metaphysics.
Oh come man. Have some faith. (pun intended) New branches and disciplines of science are regularly being created as time goes by. And also lots and lots of theories are postulated in science not by what we can see, but by what we can't see. If I remember for a long time that was the case with dark energy and dark matter, thus the "dark" in their name. Just because it isn't directly observable doesn't mean science can't dabble around the subject and rule out other reasonable possibilities one by one.