But if you get predictions from the theory that turn out to be true in the end (like entanglement, Bell's inequality, etc) then it gives you a lot of confidence in your theory.

I don't know how it'll turn out. At this point people are throwing stuff against the wall to see what sticks to get physics out of the local minima it seems to have found itself in.

I don't think Carroll or anyone else is naively wandering into this endeavor from a philosophical standpoint though.