As a "computer guy", I have frequently had people ask me to help them with their hardware or software problems. Many of the people I have helped have made statements like this: "this computer doesn't like me" or "this stupid thing is cursed" or "sometimes it just does that for no reason".
These are all statements of faith or belief, not statements of fact. Every time I have looked deeply into their claims of seemingly inexplicable behavior, I have invariably found the root cause to be a mundane one: user behavior, environmental factors, software defects, etc.
In this context, people's statements of belief are the result of ignorance, lack of expertise, or just being too lazy or not caring enough to get to the bottom of the problem.
I think that in the case of religious belief there is a similar but not identical phenomenon at work. People who believe that God exists start with the idea in their head that inexplicable things may sometimes be accounted for by the Will of God. They are willing, even anxious, to discover the hand of a benevolent deity at work in their lives. The very fact of this belief is sufficient to stop them from looking more deeply into the reasons why things around them happen. Someone overcomes an addiction? It's God's hand at work. But if you look deeply, I absolutely guarantee that you'll find it's really something like a change in neural wiring or brain chemistry that did the trick.
Ever since the introduction of conscious cognition in our genome, we humans have been trying to figure out why things are the way they are. Before we discovered the existence of the invisible world of microorganisms, we were perplexed and baffled by the appearance of illness and disease. Why did people get sick and die all the time? Our indomitable drive to identify cause and effect led us to conclude the existence of evil spirits, arbitrary deities, or other supernatural hypotheses to try to account for the seeming randomness of life because we simply could find no other explanation.
When Antonie van Leeuwenhoek, the father of microbiology, first looked through a lens and discovered the first hints of existence of this unseen world, it forever altered our perception of illness and disease. From that point onward, we were in possession of knowledge that would forever banish the need to resort to supernatural explanations about illness and disease. As of that moment it officially became a cop-out to say "God did it" in reference to bodily sickness.
That pattern of the natural displacing the supernatural has continued consistently over the centuries. Whenever we have bothered to get to the root of any problem or previously unexplained occurrence, we have always, Always, ALWAYS found that the root cause could be explained by the regular action of discoverable, testable laws that arise naturally as an inevitable consequence of the fundamental properties of matter/energy/space/time. Not once, not one single time, have we ever been forced to conclude that something has been the result of an arbitrarily powerful deity.
So when I hear people testify that they "know" this or that thing that God has done, I am deeply cognizant of how that type of non-fact-based thinking is inherently impermanent and unreliable. To quote the great line from the movie, Men in Black: "Just imagine what you'll 'know' tomorrow."