No... a field is mathematical representation. The universe is most definitely NOT made of fields.
By saying "the universe is fields", I'm saying "it's distributions of energy across spacetime". That's seemingly a consensus. Why demand that that energy must also form into strings or even tinier spheres or spheres in an alternate dimension or something? We have described fields in detail, I say Mission Accomplished
I imagine you could use that argument to shoot down pretty much any explanation.