We can have good in us though. God is the source of goodness, but it can reflect from us and eminate in us if we have the Spirit in us.
My problem with it is that it doesn't actually appeal to justice. It tries to, because most people think well, I'm probably going to heaven because I stay away from the major sins. So they're trying (ineffectively) to convict us of those. Problem is I am simply never going to believe that stealing a paper clip warrants external torment in hell.
I was reading the book 23 minutes in hell today and it struck me that the author uses practically identical apologise to defend hell. I'm sure both him and others have good intention but honestly I don't feel like they really give individuals who question hell the proper attention and they're not justifying it well. I personally hear of more people loosing their faith because of the doctrines about it.