I think it's one of our better attempts to understand a very large complex system! I think it's inherently very hard to do. I do think you can critique a lot of things about the field and ideology, and so on, but I don't think that's an inherent problem of economics.

non-obvious

I'd maybe question this a bit. I suspect that many things we consider obvious are only so because of the field of economics -- but that's admittedly only an initial hunch.