If hell remains a mystery by lack of consensus it remains more terrifying and fearful. Man fears unknown like darkness more than pain. Think of the horrors of ignorance, it is even more so with hell.
If you can quantify it and qualify it, it holds no mystery and through understanding fear is lost. Resignation replaces fear. Hope is not a motivator, pain seldom is, but fear pushes man toward reconciliation against fear.
If we are clear on what this "place" of hell is, hell will win because it can be made rational and understandable and therefor not a prison of the mind.
Man can not settle on the vagueness of hell lest hell loses it's fear factor.