Charge neutrality is that charge comes in equal positive and negative amounts. The earth is charge neutral, as is our galaxy, and the universe seems the same, but if matter arose complete and perfect, as Venus did from the sea, why balance its charge accessory? Why make a universe with equal electrons and protons but twice as many down as up quarks?
The alternative is that it wasn’t made but evolved. Quantum events repeat at a fantastic rate so whatever can change will do do sooner or later. The evolution of matter tried every option to discover what is stable. After the initial chaos, electrons, neutrinos, and quarks survived by their stability, and the first atom formed because a proton and an electron survive better together than apart. An electron around a nucleus shields it from neutrino strikes and a nucleus holds electrons in orbit so they don’t fly off. Atoms then evolved with equal protons and electrons because that is stable.
This suggests that our universe is charge neutral because matter is made of atoms that are neutral by evolution, not design. Evolution explains charge neutrality better than the assumption that it was just made so.
Quantum theory describes entities that spread in a variety of ways and choose where they collapse, so they can evolve stability, which equates to the survival of biological evolution. In contrast, the standard model calls the choice implied by quantum theory randomness, and focuses on transient particles like the Higgs that aren’t stable at all. Physics needs a better model than one that denies both quantum theory and evolution.