What makes you unbelieve Crash ?

When it comes to prayer as proof of a diety I've seen first hand how believers will turn a result to sound like the prayer caused the end result. For example my girlfriend was trying to get a job, 8 months of interviews and rejections later she was feeling pretty low. She then prayed for the next job to come through, and sure enough it did. She claimed God had helped her when she asked, I thought she'd finally found the job that best suited her and no supernatural being had anything to do with it. Would she have got the job regardless? Quite likely. The trick of the story is that she is hindu...
Its the one thing that makes me disbelieve in prayer as any kind of proof when people from every religion and every cult all claim to have results from their prayers (or scarifices for that matter). The basic idea is that you pray for something that is possible (very rare that any claims of miracles prayed for coming true) in which case there was always a chance that it would happen regardless of what you do. Common subjects like health, wealth, good grades or love, all of which happen equally to atheists, christians, hindus and any other human.
All humans regardless of religion have the same life expectancy, the same chances of illness and accidents, the same amounts of good and bad luck (barring environmental problems). If any religion is correct then its followers are not showing the benefits.