I agree somewhat with that but: only if the starting conditions were completely random. Otherwise if you set the conditions to be similar to what we know about humanity, you'd have to anticipate both cooperation and competition and parasitic behavior leading to wars and atrocities. And that also assumes that they actually have a chance to grow up for the suffering to have any meaning. If you just turn it off your science experiment at some point you have invalidated the argument.
Either way when you're playing god you'd have to morally justify yourself. Imagine you create a universe that eventually becomes an eternal hell where trillions of sentient beings are tortured through something like "I have no mouth but I must scream".