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 because it evolved. Quantum events repeat at a fantastic rate, so whatever can change will do so, sooner or later. Only what doesn’t change survives, and this is stability. In the initial chaos, electrons, neutrinos, and quarks survived by being stable, and the first atom formed because protons and electrons survive better together than apart. Electron shield the nucleus from external strikes, and the nucleus holds electrons in orbit so they don’t fly off. Atoms then evolved with equal protons and electrons because that is stable.
Our universe is then charge neutral because matter is made of atoms that are neutral by evolution not design. Evolution explains charge neutrality better than assuming that it was made just so.
Quantum theory describes entities that spread in various ways and choose where they collapse, so they can evolve the stability to survive just as biological entities do. In contrast, the standard model tries to deny the choice of quantum theory, and focuses on transient particles like the Higgs that aren’t stable at all. Physics needs a better model than one that goes against both quantum theory and evolution.