How is it not electric?? You have trillions of fields and particle’s everywhere. How’s it not programmable? It’s computing new structures with gases at any moment.
You can think of the universe that way, but is it meaningful to say it's computing new gas structures? Maybe for some physicists. Metaphysically speaking, I don't think it makes sense for the universe to be a computer, unless we're inside a simulation. What would that even mean?
The electric part seems an arbitrary limitation. The original computers ran off food, which okay technically is chemistry which technically is just a minor application of coulomb's law, but ultimately you can use stones in the desert or water flowing through pipes to compute. Of course all this is still based off chemistry, but you can imagine computing with gravity or nuclear forces.