Interesting question. I'd say it relates to where a person is at in spiritual development, as in these definitions (I know they've been referenced here before).
Basically if you are at Stage II or thereabouts, and lose confidence in a God that provides all the answers, it would be difficult to live happily. But also if you are at III or more, belonging to a religion with a lot of arbitrary rules would be stifling. But then, if all your family and/or neighbourhood believed this way it would be hard also.
Just my take on a complex issue . . .Retro