I believe we know, based on any definition of knowing - I.e. assuming we can know anything at all, and realizing that any definitions of knowing are all circular to an extent, that the electron follows some laws.

I agree that the universe doesn't care how we approximate these laws, but only that they clearly exist.

If these laws exist, they are certainly not material, unless you redefine material, and that is why I am no longer a materialist :)