Modeling highly charged universe stability based on half-life of non-primordial unstable isotopes

There is a common consensus that universe has net zero charge, or close to it down to the order 10^ -43 of excess charge density per photon. Also it is currently known that in an early universe evolution there was a Planck epoch when leptons, quarks and gluons were borned exactly so that now for each electron we have 2.6u quarks and 2.3d quarks, given that most ordinary matter is composed from (1,1) H, (4,2) He atoms. If we form net charge equation for corresponding quarks per electron and electron itself we will see that 2.6q_u + 2.3q_d + e ≈ 0. So it seems that universe at early stages has formed like so that quarks exactly balances electron charge. However it's not clear of why total universe charge must be zero or close to it. In this paper I try to get into this question a bit deeper and at least partially answer it, using analogies from non-primordial isotopes stability.