Charge neutrality is that charge comes in equal positive and negative amounts. The earth is charge neutral, as is our galaxy, and the whole universe is probably the same, but why? The standard model assumes that matter began as Venus arose from the sea, complete and perfect already, with charge an optional accessory that has two flavors, but why are they equal? Why are there as many electrons as protons in our universe? It is not at all obvious why are twice as many down quarks as up quarks, but it seems to be so. If matter just began, why dole out equal amounts of positive and negative charge? To say that it is so because it was made so, is unsatisfactory.
Quantum theory tells us that events repeat at a fantastic rate, so any entity that isn’t 100% stable will re-configure, sooner or later. Every option is tried until one sticks, i.e. is stable. After the initial chaos, electrons, neutrinos, and quarks survived by being stable, and the first atom formed for the same reason, that a proton and an electron survive better together than apart. Other atoms then evolved in the same way, with equal numbers of protons and electrons. The electrons around a nucleus shield it from neutrino strikes that could disrupt it, by turning a neutron into a proton, and the nucleus holds the electrons in orbit, so they don’t fly off. Atoms exist because they are stable.
It follows that our universe is charge neutral because matter survived as charge-neutral atoms. Matter evolved rather than just began, so the universe is charge neutral by evolution, not by an initial design allocation. The evolution of matter then explains charge neutrality better than the assumption that it was just made so by some design.
The standard model assumes that matter just is but in this model, it evolved by the law of all action, that whatever can happen eventually does, because the quantum world tries every option. This law then implies another principle of our universe, that it is evolving to a future based on what survives. Yet the standard model denies both these principles. Firstly, it opposed the randomness of quantum theory, seeking instead to impose its own fixed laws on matter. Secondly, it focused on transient particles, like the Higgs boson, that by evolution have no relevance because they aren’t stable. Physics needs a better model than one that is both anti-quantum theory and anti-evolution.