If you're curious - in the theology world, Stephen's answer is a reiteration (and a good one) of the Problem of Evil: If Good is good and all powerful, then why is there evil in the world?

The standard answer is that God may have other values than what we think of as Good. For example everything was 'good' then perhaps there wouldn't be a need for forgiveness, generosity or free will

More info: https://en.wikipedia.org/wiki/Best_of_all_possible_worlds

Would you be able to summarize what he says? At work and I can't watch any videos lol