Humans need a god figure in order to feel confident about their choices or feel forgiveness for morally degrading actions.
Maybe need isn't the proper word. It's a good substitute for relying on judgement from your peers or from higher authority, but you most certainly don't need faith to feel confident that your actions and choices are meaningful in any way.
Either way the lack of said faith is a huge emotional blow.
How so? I lack faith in anything and I'm emotionally stable. I don't look to a god for judgement of my actions and choices, and yet I feel confident when I make the right choices in life. It's not a case of being misguided, rather than I just don't hold a faith.
Even if you're a life-long atheist or non-religious being, you'll eventually find god in yourself or something else, given you don't suffer an untimely death. You can doubt it and be stubborn, but eventually it'll hit you.
So through a life of doubt and skepticism, are you saying that no matter what I would eventually become religious, or at the very least find a god? I have a hard time trying to understand what you mean.
And when you make a decisive mistake in your life, who will comfort you? Not everyone has friends who can help them, and not everyone has diamond-solid willpower to comfort themselves.
So the solution would be finding faith, or to those skeptic, coming up with an entity that you feel would forgive you. Sorry for the bluntness, but in a situation that you would need comfort for a real, physical mistake, I feel that one should seek comfort and judgement from those within immediate vicinity rather than turn towards religion as a fix-all for all societal issues.