As to the OP, we can choose to believe anything we want. God, BIgfoot, the Loch Ness Monster, little gray aliens, or fairies, it's all a matter of personal belief. My only concern or objection is when personal beliefs effect others who may not share them. With religion, this goes hand in hand so there's very often huge objections to how people practice their faith because it does seem to effect everyone else. As to more trivial things like prayer in school I have no problem with that as long as you don't expect classes to grind to a halt so you can go pray. But I have no problem with providing Kosher/Halal meals in the cafeteria like, or the ability to practice your faith while at school. Long as your beliefs effect only you and those who believe as you do I don't see the disconnect between a secular government and faith.
As to do our faiths help us. Religion doesn't have mental illness. Any kind of behaviour one might say was mental illness is treated as demonic possession or influence. So it's improtant to remember all these major religions were founded before science and medicine. So there isn't going to be any provision for treating mental illness except in brand new faiths. So how they would help us when they don't address us accurately escapes me. As with the OP's mention of a robe of righteousness, it seems to me there's two versions of people's religions, the actual scriptural one, and the pop-culture one that has a lot of warm n fuzzy sounding things but no basis in the holy texts themselves. Can't have a robe of righteosness in heaven because the Bible says we leave our bodies when we ascend. Marriage ends with death because we no longer have a body to exercise marital bliss with. Let alone clothes.

So when I see this kind of thing all I can conclude is the person doesn't know much about their own faith, or does, and is hoping no one else knows more.
"I'd rather be hated for who I am, than loved for who I pretended to be." - Me.